A celebrity from the late Cretaceous period.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

The national park was once a plantation estate.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

There’s a hidden military meme engraved on the World War II Memorial.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

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

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

The towering figures were created from the cemetery's fallen old-growth trees.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

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.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

The discovery site of the "Capitalsaurus," the official dinosaur of Washington, D.C.

Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

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

The "lovely red Vega" of the legendary record-settling pilot.

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