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

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

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

Largest Roman Catholic church in North America.

A historic neighborhood church is reborn as a psychedelic arts collective.

Home to a vast and influential collection of Shakespeareana.

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

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

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

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

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

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

An Industrial Revolution-era public work that purified water using nothing but sand.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

A wondrous old library overlooking the nation's capital.

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

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

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The 28,000-year-old specimen is remarkably intact.

Fittingly, America's museum of architecture is itself a magnificently designed old building.