Tall columns of volcanic basalt make up this improbable-seeming rock formation.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

A massive, abstract lookout tower providing a panoramic view of Prague.

Enormous sandstone towers loom within a Czech forest.

Bohemian paradise covered in majestic forests.

This former quarry is now a picturesque gorge that hides a sunken lake.

A spiral staircase twists to the top of this unusual Czech lookout tower.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

Walk through Czech history in Prague's largest graveyard.

A church of bones, decorated with 40,000 human skeletons.

Macabre astrological automaton clock dating to the late 1400s.

Countless grotesque faces stare out from this eerie Prague art wall.

The first museum in the world devoted to sexual gadgetry.

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."

The "world's smallest volcano" has been used to store meals and dispose of dead bodies.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

This cluttered cantina is famed for its cheese-spiked, raisin-flavored liqueur.

This museum has a most unusual location: inside a giant, three-headed elephant.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

Bangkok's men with dangerous jobs come here in search of protective talismans.