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

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

An enormous roadside pan tells the story of a battle for pie glory.

A 300-ship graveyard, with a few still visible at low tide.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

An essential stop before plundering, BYO Cutlass.

A museum befitting the city responsible for supplying the majority of the world's LSD.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Home to items never before seen by the public.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

Four cars from the old system were once on display, but were removed in 2014.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

2 square block factory in Greenpoint erected in 1936.

The factory that helped produce a dominant form of lighting before Thomas Edison.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

The inventor of the Coney Island hot dog rests in a grand mausoleum in Brooklyn.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

Enormous one time fiber mill now houses local artists and small businesses.

Spike Lee's provocative film is officially honored right where it was made, the first time a work of art was used as a secondary street name.