Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

The most metal church of all time was built in record time because of an international, pious pissing contest.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

1513 Turkish world map, full of European state secrets and snarky commentary.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A meow-velous tribute to a beloved street cat, made famous on the internet.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

This tiny tropical village was sick of anonymity so the locals made this sign, which actually changed the name of the town.

This living labyrinth made entirely of thorns is filled with art.

The floor of the oldest surviving synagogue in the Americas is entirely covered in sand.

The mouldering manses of wealthy colonials still pock the streets of a Curaçao neighborhood.

Shipwrecks, ruins, and turtles are all that remain on this haunting Caribbean ghost island.

The remnants of an abandoned, 19th-century gold mill along Aruba's rugged northeastern coast.

A safe place for the wild donkeys of a hot vacation destination.

Six miles off the coast of Key West, a former military transport ship is now one of the largest artificial reefs in the world.

A historic presidential getaway on the continental United States' southernmost island.

"We Seceded Where Others Failed."

The highway's southernmost spot is a beloved local attraction.

A monument celebrating the idea of reaching inaccessible places.

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.