The Smithsonian museums are a group of museums and research institutions located in Washington, D.C. They are part of the Smithsonian Institution, which was established in 1846. The museums cover a wide range of topics, including art, history, science, and culture, and they house millions of artifacts and specimens. Notable museums include the National Museum of American History, the National Air and Space Museum, and the National Museum of Natural History. Admission to most Smithsonian museums is free, making them accessible to everyone. The institution also conducts research and offers educational programs to promote learning and appreciation of various subjects. Visitors can explore diverse exhibitions, including dinosaur fossils, historical artifacts, and space exploration memorabilia.