Dedicated to a Bolshevik revolutionary, this museum is a true time capsule of the Soviet era.

A boulder carved into the shape of the cosmonaut's head.

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

Extremely isolated Silk Road caravanserai in the middle of nowhere.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

A much-maligned monument to teetotalism.

A historic arena where the Beatles played their first concert in the U.S.

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

Helen Keller once broke ground on this historic center for the study of technologies to benefit the hearing impaired.

When it comes to handsignals (and colonialism) rock always beats scissors.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

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

Look closely and you’ll notice that the color changes a third of the way up the tower.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.