Faces carved into the cliffs create an otherworldly walking trail.

A fantastic Christmas tradition where defecation meets the manger.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

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

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

An abandoned warehouse turned art sanctuary in New Orleans.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

This beautiful and unmissable little museum is full of fascinating artifacts from Mesoamerica's great civilizations.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

This influential Renaissance-era library was once the haunt of kings and monks.

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

This strange statue features a bust of the famous composer plopped atop a woman's body.