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

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

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.

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

This grand gothic brewery has been pumping out suds for over a hundred years.

A small token of gratitude from freezing cold journalists who were given a warm haven while covering JFK's inauguration.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

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

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

People escaping slavery may have hidden inside a corpse vault.

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

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

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

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

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

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

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

The most accurate timepiece in the world.

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

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

An obscure federal monument honors the French diplomat who served as Ambassador to the U.S. during WWI.