There’s a special club house at the top for the bell ringers.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

Washington's iconic carousel has a nice piece of Civil Rights history.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

The most accurate timepiece in the world.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Largest Roman Catholic church in North America.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

A painfully obvious spy house sits right across the street from the Russian Embassy.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

100-year-old shipwreck you can walk up to at low tide.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

The largest wooden building in the world now houses a fascinating collection of aircraft.

A logging-themed roadside restaurant surrounded by museum-quality machinery and artifacts from the industry's heyday.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

The wooden airship was the largest flying boat ever built.

Home of Howard Hughes' Spruce Goose.