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Aspen Meadows is a 40-acre conference center and resort located amongst the Rocky Mountains in Aspen, Colorado. It is owned by the Aspen Institute, and is the venue for some of the institute's events, such as the annual Aspen Ideas Festival and Socrates Program seminars. It was designed by Herbert Bayer in the Bauhaus style.

The Hala Ranch is a 95-acre (380,000 m2) estate located just north of Aspen, Colorado, originally purchased and given its name by Prince Bandar bin Sultan. The main house on the property was designed by the architectural firm of Hagman Yaw and built by Hansen Construction of Aspen, Colorado, in 1991. The estate has been ranked by Forbes magazine as the most expensive home in the United States, once listed at $135 million. John Paulson bought the ranch in 2007 for $49 million, according to the Wall Street Journal. The Saudi Prince purchased the land while he served as ambassador to the United States, and originally visited about three times a year. The Prince's visits, which were always announced to local officials for security reasons, became less frequent after the terrorist attacks on September 11, 2001, which were carried out mostly by Saudi nationals. in 2007, Prince Bandar bin Sultan sold the estate, after accepting a position as National Security Councillor in Saudi Arabia. The estate has its own wastewater treatment plant and a mechanical shop with its own gasoline pumps and car wash. Cross-country ski trails are maintained throughout the property. The centerpiece lodge of the estate is larger than the White House. It is built in a rustic style, with massive timber beams and stone columns, and contains 15 bedrooms, all with patios, and 16 bathrooms. There is also an interior elevator. The decoration of the interior features mahogany wood and bronze hardware, as well as stained glass windows and a wood-burning fireplace. The master wing has a room set aside for grooming, while guest rooms open onto a courtyard with a reflecting pool and waterfall. Other amenities of the estate include a commercial kitchen, a fishing pond, a racquetball court, a sophisticated security system, heated hay barn and stables, steam room, a swimming pool, and a tennis court. In December 2007, the 14,395-square-foot (1,337.3 m2) guesthouse was sold for a reported $36.5 mm.

KASP-LP (107.9 MHz FM) is a low-power radio station rebroadcasting NOAA Weather Radio station WWG43 in Glenwood Springs, Colorado. Licensed to Aspen, Colorado, United States, it serves the Aspen area. The station is currently owned by the Colorado Department of Transportation.

The Aspen Center for Physics (ACP) is a non-profit institution for physics research located in Aspen, Colorado, in the Rocky Mountains region of the United States. Since its foundation in 1962, it has hosted distinguished physicists for short-term visits during seasonal winter and summer programs, to promote collaborative research in fields including astrophysics, cosmology, condensed matter physics, string theory, quantum physics, biophysics, and more.To date, sixty-six of the center’s affiliates have won Nobel Prizes in Physics and three have won Fields Medals in mathematics. Its affiliates have garnered a wide array of other national and international distinctions, among them the Abel Prize, the Dirac Medal, the Guggenheim Fellowship, the MacArthur Prize, and the Breakthrough Prize. Its visitors have included figures such as the cosmologist and gravitational theorist Stephen Hawking, the particle physicist Murray Gell-Mann, the condensed matter theorist Philip W. Anderson, and the former Prime Minister of the United Kingdom, Margaret Thatcher.In addition to serving as a locus for physics research, the ACP’s mission has entailed public outreach: offering programs to educate the general public about physics and to stimulate interest in the subject among youth.

The original Maroon Creek Bridge is a steel trestle along State Highway 82 at the western boundary of Aspen, Colorado, United States. It was designed by George S. Morison in 1888 for the Colorado Midland Railroad, one of the last viaducts in Colorado built for a standard gauge mountain railroad in the 19th century. Of the five steel bridges the Midland built, it is the only one still extant. Due to the later removal of most track and the rail depots, the bridge is the most visible remnant of rail service to Aspen. In 1985 it was listed on the National Register of Historic Places along with other highway bridges in the state, including the Sheely Bridge, also in Aspen.When it was built, the Midland was ahead in its race with the Denver and Rio Grande to make the first rail connection to Aspen, then a booming silver mining center. The Midland had followed the Roaring Fork Valley up from its main line at Glenwood Springs, but was stalled at Maroon Creek by a delay in the bridge steel. The Rio Grande was thus able to make up the difference and bring the first train to Aspen, with the Midland following a few months later. Aspen's boom years ended a few years later, and by the 1920s the bridge was abandoned. It was soon expanded and converted to use as a road bridge. It served as the main entrance to Aspen for many visitors as the city's economy rebounded when the Aspen Mountain ski resort was developed after World War II. As growth spilled over to Aspen's west, it became a traffic choke point for the region. It remained in use until longstanding plans for a newer, wider bridge came to fruition in 2008. At that time the original bridge was the oldest one still in use on Colorado's state highways. The award-winning new bridge was designed to be aesthetically similar to its predecessor, which remains in service as a foot bridge. It may be used for a light rail line to further alleviate traffic problems in the valley.

Aspen is a home rule municipality that is the county seat and the most populous municipality of Pitkin County, Colorado, United States. The city population was 7,004 at the 2020 United States Census. Aspen is in a remote area of the Rocky Mountains' Sawatch Range and Elk Mountains, along the Roaring Fork River at an elevation just below 8,000 feet (2,400 m) above sea level on the Western Slope, 11 miles (18 km) west of the Continental Divide. Aspen is now a part of the Glenwood Springs, CO Micropolitan Statistical Area. Founded as a mining camp during the Colorado Silver Boom and later named Aspen for the abundance of aspen trees in the area, the city boomed during the 1880s, its first decade. The boom ended when the Panic of 1893 led to a collapse of the silver market. For the next half-century, known as "the quiet years", the population steadily declined, reaching a nadir of fewer than 1000 by 1930. Aspen's fortunes recovered in the mid-20th century when neighboring Aspen Mountain was developed into a ski resort, and industrialist Walter Paepcke bought many properties in the city in the 1950s and redeveloped them. Today it is home to three institutions, two of which Paepcke helped found, that have international importance: the Aspen Music Festival and School, the Aspen Institute, and the Aspen Center for Physics.In the late 20th century, the town became a popular retreat for celebrities. Gonzo journalist Hunter S. Thompson worked out of a downtown hotel and ran unsuccessfully for county sheriff. Singer John Denver wrote two songs about Aspen after settling there. Both figures popularized Aspen among the counter-cultural youth of the 1970s as an ideal place to live, and the city continued to grow even as it gained notoriety for some of the era's hedonistic excesses (particularly its drug culture).Aspen remains popular as a year-round destination for locals, second-home buyers and tourists. Outdoor recreation in the surrounding White River National Forest serves as a summertime counterpart to the city's four ski areas. Prime residential real estate in Aspen is the most expensive of any ski resort in the world on a per-square-foot basis, according to a study of 44 global ski resorts. Aspen is the world's second-highest-rated ski resort in terms of "the quality and reliability of their conditions and their capacity to withstand climate change."

The Samuel I. Hallett House is located on West Francis Avenue in Aspen, Colorado, United States. It is a timber frame structure built in the late 19th century. In 1987 it was listed on the National Register of Historic Places. It was originally a log cabin built by one of the miners who came to Aspen in its earliest years of settlement, during the Colorado Silver Boom. Samuel I. Hallett, who later expanded it, was an officer of the Smuggler Mine, one of Aspen's largest and most lucrative. When its owners renovated it in the mid-20th century, they discovered the remnants of the original log cabin. Since then it has been through multiple owners, and remains a private residence.

The Shilling–Lamb House, also sometimes referred to as Victoria House, is located on North Second Street in Aspen, Colorado, United States. It is a wood frame structure in the Queen Anne architectural style built around 1890. In 1987 it was listed on the National Register of Historic Places. It is unique among Aspen's Queen Anne houses both for its minimal decoration and its corner tower. The name comes from its first two occupants. In the later 20th century it was the home of Edgar Stanton, a cofounder of the Aspen Music Festival and School who established its training program for recording engineers. It has remained a private residence, largely intact from the time of its construction.

The Wheeler–Stallard House is located on West Bleeker Street in Aspen, Colorado, United States. It is an 1880s brick structure built in the Queen Anne architectural style, and renovated twice in the 20th century. In 1975 it was listed on the National Register of Historic Places. It was built by Jerome B. Wheeler, an early investor in Aspen's silver mines during its boomtown years. He and two wealthy tenants rarely spent much time in the house before the Colorado Silver Boom ended in 1893. After a decade of vacancy, it became the home of the Stallard family for much of the early 20th century, the "quiet years" when Aspen's economy was depressed and its remaining residents struggled to make a living. After World War II it was bought by Walter Paepcke, who like Wheeler came to visit Aspen and invested heavily in its development, leading to the city becoming a cultural center and upscale ski resort. He never lived there himself, and it eventually became the residence of Alvin C. Eurich during his tenure as Aspen Institute president. Since the late 1960s it has been the home of the Aspen Historical Society, which operates it partially as a historic house museum.

The Newberry House, also known as the Judge Shaw House, is located on Lake Avenue in Aspen, Colorado, United States. It is a wooden structure in the Shingle Style built around 1890. In 1987 it was listed on the National Register of Historic Places along with other properties in the city. It incorporates an unusual carriage house into its overall design, the only house in Aspen to do so. In 1922 William Shaw, an attorney who had specialized in water law, moved in, following his ascension to the city's judgeship the previous year. He remained in the house until 1969, during which time Aspen went from a depressed former mining town to a bustling, glamorous ski resort, a process he played a small role in. After his tenure, the house passed to other owners, eventually becoming one of several Aspen properties owned by Jack Nicholson, one of the celebrities who had early on been drawn to Aspen as a retreat, until he sold it in 2013. It has remained intact with few alterations.

The Holden/Marolt Mining and Ranching Museum is located on the former Holden Lixiviation Works facility on the western edge of the city of Aspen, Colorado, United States. It consists of two remaining buildings from the facility, as well as the relocated McMurchy/Zupancis domestic buildings. In 1990 the property was recognized as a historic district and listed on the National Register of Historic Places, the only district in the city to be so recognized. The museum is housed in the former sampling building, which was built in 1891 to process ore mined from the mountains around the city into silver through lixiviation. Within two years it had to be shut down when a change in U.S. government policy led to a huge drop in silver production and drove it into bankruptcy. The buildings remained standing and were eventually bought by a local rancher to expand. His family later sold them to the City of Aspen, which turned the property into an open space and leased the buildings to Aspen Historical Society, to operate as a museum.

The Davis Waite House is located on West Francis Street in Aspen, Colorado, United States. It is a wooden structure in Victorian architectural styles built during the 1880s. In 1987 it was listed on the National Register of Historic Places along with several other historic properties in the city. Davis H. Waite, an early owner, was one of the founding publishers of The Aspen Daily Times. He was later elected governor of Colorado. After a single term he returned to Aspen. Later owners included Herbert Bayer, an Austrian architect extensively involved in the mid-20th-century renovation of Aspen, and Robert Orville Anderson, an oil executive who was chairman of the Aspen Institute board.The property includes two small outbuildings, one of which is a more modern one that has been connected to the main house since its construction. The unconnected one is believed to be one of Aspen's few remaining original log cabins, now covered in clapboard, and is thus considered a contributing resource to the National Register listing. All buildings have remained largely intact.