Places 3toe Wants to Go

A gargantuan crystal kingdom.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

The wartime boat shelter now doubles as an underground concert hall where musicians play on rafts along the waterway.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

A miniature train-ride through Slovenia's largest cave system.

This massive subterranean fissure is known as the "underground Grand Canyon."

After visiting hours, this picturesque waterfall is essentially turned "off" to be used for hydroelectric power.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

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

A beloved carnival gets a modern makeover in Los Angeles.

Believed to be haunted, this old cemetery is beautifully adorned with Spanish moss hanging from the trees.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

This cave system allegedly holds the "metallic library" of a lost ancient civilization.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

Plenty of old carney magic still haunts this photogenic amusement park.

An abandoned hotel in the highlands of Bali is shrouded in stories of ghosts, curses, and corruption.

An abandoned saucer-shaped monument in the Bulgarian mountains.

Surreal riveted sea forts once protected the Kent shores from German attack.

An Italian hillside ghost town.

A haunting theme park is slowly being swallowed by the jungle.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

This abandoned Antarctic research station is a Soviet ghost frozen in time.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.