A 20th-century picture show in 3-D.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

Once the most densely populated place in the world, this island is now a ghost town.

A South African bar inside a hollowed out 6,000-year-old Baobab.

Monasteries on rock pillars, once accessible only by frayed ropes.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

An enormous, inside-out glass globe built in 1935.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

A 30-acre garden inspired by the principles of modern physics.

The largest traditional Chinese medicine market in the world sells ingredients that may make you squirm.

A quick and simple solution to Cambodia's train woes.

The fantastic architectural models of a French traveler.