Believed to be the birthplace of the United States Marine Corps.

This overlooked courtyard and museum celebrate Benjamin Franklin's life and achievements.

This elaborate towering structure was once famed for its revolutionary height.

Step into a pastel time capsule where candy is truly dandy.

The first American department store, and home to the largest operating musical instrument in the world.

The oldest surviving botanic garden in the United States.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The Lincoln Memorial has inspired many, even though a word on the inscription appears to be spelled incorrectly.

A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

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.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

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

A nostalgic bibliographic gem.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

Over several decades, one of London’s most iconic city gates was dismantled, moved out of the city, and then moved back.

Dedicated to the first Black recipient of the Navy Cross.

The largest underground pedestrian tunnel system in the U.S. mostly caters to the people working in the offices above, but provides a great, air-conditioned way to traverse the city.