In Paradise Cemetery resides a mysterious headstone with a strange inscription.

A trove of tiny treasures hidden within a Florida park.

An abandoned underground bunker not far from downtown New Orleans.

Suffocating dogs was a common spectacle in the fumes of this noxious cave.

There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

A pink cottage covered in hearts served as a haven and a resting place for LGBTQ activists.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

These half-buried combine harvesters just off Route 66 are an homage to the Cadillac Ranch.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

This memorial marks the devastating day that Texas City was destroyed in a daisy chain of exploding ships.

This museum chronicles the history of a leprosy quarantine hospital that then became a refuge.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

A former electrical substation is now home to an eccentric junk art masterpiece.

A lone gunner's station is all that remains of a replica Spanish Fort in Florida.

An 1870s ranch for pioneers, rodeo stars, and divorcees was abandoned and left for dead, until the city reopened it for exploration.

Etched into a dry lake bed, this massive directional indicator is accurate without magnets.

A trio of colossal statues spread across a Dallas neighborhood chart the emergence of a giant robot born of a locomotive and spilled gin.

This failed condo development was reborn as a street art hub.

A private collection of massive steel monsters guarding a Texas pipe works.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.