An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

For six months of the year, three giant mirrors direct a pool of sunshine onto this otherwise occluded town.

A small house sits between two huge rocks, with its back to the sea.

A fiery crater has been burning in the Karakum Desert since 1971.

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

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

The cell which saved the life of Ludger Sylbaris, "the man who lived through Doomsday."

At the point of oceanic inaccessibility, you can't get farther from dry land without leaving the planet.

Despite what scientists think, the town still says this is an extraterrestrial rock.

Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

The only diamond mine in the world where you can keep what you find.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

This magical-looking island is notorious for the misfortunes suffered by its owners.

An acoustic anomaly with a mysterious cause.

Walk 2,300 feet above the ground on the "Troll's Tongue."

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

A stunning silver lining to global warming's gloomy cloud.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

Vikings and Evangelicals have both had a hand in this replica medieval church.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.