Ruins from the Parthenon and petrified wood line the interior of one of the world's most famous monuments.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

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

The Lincoln Memorial has inspired many, even though a word on the inscription appears to be spelled incorrectly.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

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

The first presidential bomb shelter was located in an old vault under the Treasury, connected to the White House via tunnel.

There's an old indoor swimming pool hidden directly underneath the White House Press Briefing Room.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

A layered tribute to the work of mosaicist Isaiah Zagar.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

The world’s first penitentiary, meant to be humane, drove men insane.

Yo, Adrian!

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

New York's southernmost subway station is whimsically wavy.

A wooden rollercoaster that still delivers a thrill.

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

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

This maze-like, oceanfront gift shop—the nation’s largest— has been serving kitsch to the Myrtle Beach community for over 80 years.

If Myrtle Beach is the mini golf capital of the world, this is its crowning glory.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.