Dramatic river bend surrounds a natural red-rocked pedestal.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Most-visited and most-photographed slot canyon in the American Southwest.

A crumbling hospital from the 1850s on Roosevelt Island.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Rippling sand dunes frozen in the Arizona rock.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

This Funeral Hearse Museum represents the finest in cadaver transportation.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Commonly acknowledged as the only public monument to the Devil himself.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.