Hindu Temple of Greater Chicago

The Lemont Downtown Historic District is a commercial historic district encompassing 14 city blocks in downtown Lemont, Illinois. The district has served as the village's downtown since the 1850s, when the newly opened Illinois & Michigan Canal and subsequent limestone quarrying in the area sparked a local economic boom. It expanded through the late nineteenth and early twentieth centuries as new railroads and the Chicago Sanitary and Ship Canal brought residents and business opportunities to the village. The commercial buildings in the district exhibit a variety of common building types seen between 1850 and 1950; one-part, two-part, gable-front, and false-front buildings are all present, and their designs feature Italianate, Commercial, and revival style architecture. The district also includes several of Lemont's government buildings, including its village hall and post office.The district was added to the National Register of Historic Places on September 6, 2016.

Lemont station is a station on Metra's Heritage Corridor in Lemont, Illinois. The station is 25.3 miles (40.7 km) away from Union Station, the northern terminus of the line. In Metra's zone-based fare system, Lemont is in zone E. As of 2018, Lemont is the 105th busiest of Metra's 236 non-downtown stations, with an average of 455 weekday boardings.As of 2022, Lemont is served by three inbound trains in the morning and three outbound trains in the evening on weekdays only. Lemont station was originally built by the Chicago and Alton Railroad in 1859 and designed in a manner similar to that of Lockport station. The tracks run parallel to the Illinois and Michigan Canal, and shares the right-of-way with Amtrak's Lincoln Service and Texas Eagle trains, however, no Amtrak trains stop here.

Lemont is a village located in Cook, DuPage, and Will counties in the U.S. state of Illinois, and is a south-west suburb of Chicago. The population was 17,629 as of the 2020 census. The village is situated on a hillside along the south banks of the Des Plaines River. It overlooks Waterfall Glen's Midwestern Bluff Savanna on the opposite side. Lemont is home to Argonne National Laboratory and other heavy industrial sites, and has a substantial European immigrant population.

Lemont Methodist Episcopal Church, also known as the Old Stone Church, is a historic church building at 306 Lemont Street in Lemont, Illinois. It was built in 1861 and added to the National Register in 1986.

The Lemont Central Grade School is a former school building at 410 McCarthy Road in Lemont, Illinois. The school was built in 1869 to replace Lemont's first school, which opened in 1836 when the area was still largely rural. Locally quarried limestone was used to construct the school; at the time, limestone production was one of the city's main industries. Architect John Barnes of Joliet designed the Victorian building. As the city's population grew considerably during the construction of the Chicago Sanitary and Ship Canal in the 1890s, an annex was placed on the school in 1896 to accommodate additional students. The school operated until building safety issues forced its closure in 1974; at the time, it was the oldest continuously operating school in the state. The building has since been converted to condominiums.The building was added to the National Register of Historic Places on March 7, 1975.

SS. Cyril and Methodius in Lemont (Polish: Kościół Świętego Cyryla i Metodego) - historic church of the Roman Catholic Archdiocese of Chicago, located in Lemont, Illinois. It is a prime example of the so-called 'Polish Cathedral style' of churches in both its opulence and grand scale. Along with the Hindu Temple of Greater Chicago, it is one of the two monumental religious edifices that dominate the Lemont skyline.

The Advanced Photon Source (APS) at Argonne National Laboratory (in Lemont, Illinois) is a storage-ring-based high-energy X-ray light source facility. It is one of five X-ray light sources owned and funded by the U.S. Department of Energy Office of Science. The APS began operation on March 26, 1995. It is operated as a user facility, meaning that it is open to the world’s scientific community, and more than 5,500 researchers make use of its resources each year.

The Forge: Lemont Quarries Adventure Park is an adventure park that opened July 17, 2020 in Lemont, Illinois, a suburb of Chicago. It is a public-private partnership with the Village of Lemont and Lemont Township.Covering approximately 300 acres (120 ha), it features ziplines, ropes courses, climbing towers and walls, bouldering areas, fishing, paddleboating, kayaking, mountain biking and hiking trails and other outdoor activities. The ropes course will be the tallest in North America, at over 120 ft (37 m). It also has adventure dining, a beer garden, an event venue, and summer camps.The park was built on disused industrial land and flooded former Lemont yellow dolomite quarries straddling the Illinois and Michigan Canal National Heritage Area, and abutting the Chicago Sanitary and Ship Canal. It is named after the Forge Quarry and uses it, the Great Lakes Quarries, and the I&M Canal as water features. It was originally scheduled to open on May 25, with a grand opening scheduled for June 27, 2020, but due to the COVID-19 pandemic this was pushed back to July 2020.

Chicago Pile-5 (CP-5) was the last of the line of Chicago Pile research reactors which started with CP-1 in 1942. The first reactor built on the Argonne National Laboratory campus in DuPage county, it operated from 1954-1979.CP-5 was a thermal-neutron reactor using enriched uranium as fuel and heavy water as coolant and as a neutron moderator. It produced neutrons for use in research. The reactor had an output rating of 5 megawatts.Cleanup and decommissioning of the site of CP-5 was started in 1991 completed in 2000. The cleanup process included removal of all contaminated equipment and spent fuel, decontamination of the reactor vessel and associated plumbing, and removal of the spent fuel pool, reactor internals and the hot cell liner. The accessible areas of the structure have been certified as having radiation levels equivalent to background radiation.

Now the NBL Program Office, the New Brunswick Laboratory (NBL), was a United States government-owned and operated, center of excellence in the measurement science of nuclear materials. It was established in 1949 by the Atomic Energy Commission and was located in New Brunswick, New Jersey. It was relocated between 1975 and 1977 and was located, as a Federal enclave, on the site of Argonne National Laboratory, about 40 kilometers (25 miles) southwest of Chicago, Illinois. NBL was part the Department of Energy's Office of Science Chicago Office.NBL is the U.S. Government's Nuclear Materials Measurements and Reference Materials Laboratory and the National Certifying Authority for nuclear reference materials and measurement calibration standards. As an internationally recognized Federal laboratory, NBL provides reference materials, measurement and interlaboratory measurement evaluation services, and technical expertise for evaluating measurement methods and safeguards measures in use at other facilities for a variety of Federal program sponsors and customers. NBL functions as a Network Laboratory for the International Atomic Energy Agency (IAEA). NBL was reorganized into the NBL Program Office in 2016, and its nuclear reference materials were transferred to a new distribution center located near Oak Ridge, Tennessee. It is part of the National Nuclear Security Administration's Office of Defense Programs.

The Des Plaines River Valley Bridge is a post-tensioned concrete girder toll bridge in the northeastern portion of the U.S. state of Illinois. It carries Interstate 355 (I-355) over the Des Plaines River, the Chicago Sanitary and Ship Canal, the Illinois and Michigan Canal, several railroad lines, Bluff Road, New Avenue and a forest preserve. It is officially named the Veterans Memorial Bridge. There are title plaques on the square pillars at the north and south entrances to the bridge. The bridge is 1.3 miles (2.1 km) long.The bridge consists of 34 piers from 10 to 75 feet (3 to 23 m) in height. A lower level bridge was also built for maintenance purposes, and to carry a bicycle trail that will connect other bicycle trails in the area. The total height of the bridge ranges from 80 to 100 feet (24 to 30 m). The height of the bridge allows the endangered Hine's Emerald Dragonfly to fly safely beneath the bridge, away from the flow of traffic.

Argonne National Laboratory is a federally funded research and development center in Lemont, Illinois, United States. Founded in 1946, the laboratory is owned by the United States Department of Energy and administered by UChicago Argonne LLC of the University of Chicago. The facility is the largest national laboratory in the Midwest. Argonne had its beginnings in the Metallurgical Laboratory of the University of Chicago, formed in part to carry out Enrico Fermi's work on nuclear reactors for the Manhattan Project during World War II. After the war, it was designated as the first national laboratory in the United States on July 1, 1946. In its first decades, the laboratory was a hub for peaceful use of nuclear physics; nearly all operating commercial nuclear power plants around the world have roots in Argonne research. More than 1,000 scientists conduct research at the laboratory, in the fields of energy storage and renewable energy; fundamental research in physics, chemistry, and materials science; environmental sustainability; supercomputing; and national security. Argonne formerly ran a smaller facility called Argonne National Laboratory-West (or simply Argonne-West) in Idaho next to the Idaho National Engineering and Environmental Laboratory. In 2005, the two Idaho-based laboratories merged to become the Idaho National Laboratory.Argonne is a part of the expanding Illinois Technology and Research Corridor.