Washington D.C.

Obelisk built to commemorate George Washington, the first President of the United States; the world's tallest predominantly stone structure and the world's tallest obelisk.

Unfinished Byzantine and Romanesque Revival cathedral that is the largest church building in the United States.

National museum dedicated to human flight and space exploration, with several spacecraft and aircraft on display.

Natural history museum home to the largest natural history collection in the world, with over over 146 million specimens of plants, animals, fossils, minerals, rocks, meteorites, human remains, and human cultural artifacts.

National museum that collects, preserves, and displays the heritage of the United States in the areas of social, political, cultural, scientific, and military history.

Largest museum dedicated to African-American history and culture, with more than 40,000 objects in its 10-floor collection.

Museum devoted to the culture of the Indigenous peoples of the Americas.

Landmark that holds original copies of the three main formative documents of the United States and its government: the Declaration of Independence, the Constitution, and the Bill of Rights.