This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

A rare example of World War I trenches from the British front.

The narrowest house in America is seven feet of pure spite.

A celebrity from the late Cretaceous period.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The language and heritage of a nearly forgotten culture can still be explored in this Southern enclave.

The remains of a chapel created for convenience.

A pink and gray pair of pachyderms advertise a fireworks shop.

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

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

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

Steinbeck's old stomping grounds, immortalized in Cannery Row.

Every year, over 25,000 monarchs overwinter in Pacific Grove.

Haunting and beautiful trees, doomed to die.

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

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

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

Corn-inthian columns with a uniquely American take on neoclassical architecture.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.