This huge pile of volcanic boulders hides a stunning network of secret grottoes.

This island hill is strewn with boulders carved by shipwreck victims from the age of sail.

A nearly century-old amusement park is quietly decaying in a riverside forest in South Carolina.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

The ruins of a world-renowned medieval hospital.

The ruins of Brisbane’s own Alcatraz now sit in the middle of a national park.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

The final resting place of one of Germany's most accomplished Renaissance men.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

In this German city center, the streets have no names.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

Live long and prosper in Tennessee.

The impeccably spiced roast pork buns at this bakery are worth the wait.

Indents in the pavement are all that remain from a grisly death machine in Paris.

There's a crumbling old mansion inside the Smithsonian National Zoo.

The site where the Spanish first landed in Mexico was once a thriving Mesoamerican city.

This mansion on an island off the coast of Georgia once belonged to a 108-year-old heiress.

A multiversal transit station located right below a highway interchange.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Dedicated to the "World's Luckiest Fishing Village."