Flagstaff Mountain (Boulder County, Colorado)

Niwot Ridge is an alpine ecology research station located 65 km north-west of Denver in north-central Colorado. It is on the Front Range of the southern Rocky Mountains and lies within the Roosevelt National Forest. Niwot Ridge is 2,900 metres (9,500 ft) high.

The Boulder Creek Bridge near Boulder, Colorado is a concrete slab and girder bridge which was built in 1953. It was listed on the National Register of Historic Places in 2003.It brings Colorado State Highway 119 over Boulder Creek, and was under Federal rather than state management as the highway provides access from Boulder to the Roosevelt National Forest.It was designed by the U.S. Bureau of Public Roads. It is 100 feet (30 m) in total length, and 39 feet (12 m) wide carrying a 34 feet (10 m)-wide roadbed. It consists of three spans, the main one being 48 feet (15 m) long. It has concrete abutments, wingwalls, and spill-through piers. Steel flex beams on the approach were a later addition.It was deemed technologically significant as one of the first concrete girder bridges in Colorado of a new type, having parabolically arched beams rather than flat ones, and supported by concrete spill through piers.

The Flatirons are rock formations in the western United States, near Boulder, Colorado, consisting of flatirons. There are five large, numbered Flatirons ranging from north to south (First through Fifth, respectively) along the east slope of Green Mountain (elev. 8,148 ft or 2,484 m), and the term "The Flatirons" sometimes refers to these five alone. Numerous additional named Flatirons are on the southern part of Green Mountain, Bear Peak, and among the surrounding foothills.

Highland Lawn is a subdivision in Boulder, Colorado. The subdivision contains a concentration of well-preserved buildings reflecting the prevailing architectural tastes at the turn of the twentieth century, including Queen Anne style, Classic Cottage, and Victorian house vernacular styles. Hannah Connell Barker platted the middle-class neighborhood in 1884 as the Town of Highland Lawn. The area is significant for its association with historic persons and events and as an excellent collection of buildings reflecting architectural styles of the period. The City of Boulder has established the Highland Lawn Historic District encompassing a large portion of the original subdivision.

Green Mountain is a mountain summit on the eastern flank of the Front Range of the Rocky Mountains of North America. The 8,148-foot (2,484 m) peak is located in Boulder Mountain Park, 4.2 miles (6.8 km) southwest by south (bearing 219°) of downtown Boulder in Boulder County, Colorado, United States. The mountain is renowned for the Flatirons rock formations on its eastern flank.

Arnett-Fullen House also known as the Gingerbread House, is located on 646 Pearl Street in Boulder, Colorado and is on the list of the National Register of Historic Places listings in Boulder County, Colorado since 2009. This house features a mixture of architectural styles and is a two-story, private residency, which is sometimes open to the public.

Highland School, also or previously known as Highland-Lawn School, is an 1892 building at 9th Street and Arapahoe Avenue in Boulder, Colorado. It was the fourth school built in Boulder and was used as a school until 1971. The Highland School Building was converted to use as an office building and placed on the National Register of Historic Places in 1978. The building is constructed of red brick and blond sandstone mined from local quarries.Highland School was threatened with demolition in 1971. Civic leaders opposed to the demolition of the School and nearby Central School (Boulder, Colorado) formed Historic Boulder, Inc. to advocate for its preservation.The school was designed by the Denver firm of Varian and Sterner in 1890. It was doubled in size in a 1923 extension which was designed to be entirely compatible to the original building.

The Colorado Chautauqua, located in Boulder, Colorado, United States, and started in 1898, is the only Chautauqua west of the Mississippi River still continuing in unbroken operation since the heyday of the Chautauqua Movement in the 1920s. It is one of the few such continuously operating Chautauquas remaining in the United States, and was designated a National Historic Landmark in 2006. According to its governing body, the Colorado Chautauqua Association, it is also unique in that it is the only year-round Chautauqua.

The Colorado Music Festival is a classical music festival in Boulder, Colorado. It was founded in 1976 by the Vienna-born conductor and violinist, Giora Bernstein and presents an annual summer season of concerts in Boulder's Chautauqua Auditorium performed by the Colorado Music Festival Orchestra as well as visiting artists and ensembles. The festival runs from late June to early August with a focus on orchestral and chamber music. Orchestra members representing many of North America's best professional orchestras come to Colorado to participate. Its current music director is Peter Oundjian.

The Chautauqua Auditorium is a wooden building constructed for the first season of the Colorado Chautauqua in 1898, and through the years has been a venue for many lectures, musical performances, and motion pictures both primitive and modern. Located at the Colorado Chautauqua in Boulder, Colorado, it was placed on the National Register of Historic Places in 1978. It then stood "almost as it was built and as it was dedicated on July 4, 1898."

The Boulder Public Library is the public library of Boulder, Colorado in the United States. The main branch and the Carnegie Branch Library for Local History are located in downtown Boulder, while the George Reynolds and Meadows Branches are in south Boulder.

The Boulder History Museum, now doing business as the Museum of Boulder (operated by the Boulder Historical Society), is a private, nonprofit, local history museum located in Boulder, Colorado. From 1985 to 2018, the Museum operated out of the historic Harbeck-Bergheim house on University Hill near the University of Colorado Boulder campus. In April 2013, it purchased the Masonic Lodge building at Broadway and Pine for $2.45 million. Renovations began in 2017 and the new Museum opened on May 19, 2018.In 2015 the Boettcher Foundation granted the museum $75,000 to renovate the former Masonic Lodge building. In addition, the museum received a $500,000 challenge grant from the National Endowment for the Humanities to help aid in renovations. Voters approved, in 2014, $4 million as part of the Community, Culture and Safety Tax. In October 2017, Stephen Tebo donated $1.5 million to the Museum of Boulder, allowing him the opportunity to name the new museum building.The Museum of Boulder works in conjunction with the Boulder Carnegie Library in order to preserve over 900,000 historic photographs and documents. The museum also has a collection of over 45,000 historical artifacts.