A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

Montreal's colorful subway station shows its support of the local LGBT+ community.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Cryptic messages embedded in the New York City sidewalk.

Elevated freight railway turned wildly successful urban park.

Tucked in the back of this amazing antique store is an important piece of medical history.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

A Beaux-Arts triumph rises from decades of decay to become the heart of a new innovation district.

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

The Uros people live on floating reed islands in lake Titicaca.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A pocket of Buenos Aires with an unusually high concentration of psychotherapists.

A bright little alley in La Boca is a part of tango history.

A wall of chewing gum moonlights as collective art.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

Rotting dome home spotted near Chapel Hill, North Carolina.

This research center for rare prosimians is studying how they sleep to help prolong human life.

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Oriental bazaar in the heart of Sarajevo.

The place where World War I began.

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