This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

Most prolific publishing house in the 1600s open to the public.

A huge old mansion full of thousands of toys, each there to be used and played with.

A roadside attraction filled with an astounding array of gloriously wacky vehicles.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Whimsical artist house in the New Jersey woods.

Diego Rivera's massive tiled fountain and failed infrastructure project.

The last home designed in its entirety by noted architect Luis Barragán owes its existence to an impressive jacaranda tree.

A gargantuan crystal kingdom.

The ruins of an abandoned church mingle with the graves at Oaxaca’s General Cemetery.

At this Oaxaca contest, artists turn purple produce into stunning depictions of saints, buildings, and La Pietà.

The unique collection of gifts includes braids of human hair, a spoon, and a Virgin made of bread.

Extraordinary sculpture garden created by an eccentric English poet.

Frida Kahlo's childhood home, now a museum of her life and works.

This immense scene of a cosmic battle between a jaguar and serpent illustrates the Aztec concept of the duality of life.

A colorful "forest" made entirely from three tons of recycled plastic waste.

The famous artist couple lived and worked here, in two different houses separated by a bridge.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

The studio of Catalonia's most famous theatrical designer remains exactly as he left it.

The largest collection of handbags in the world, the oldest of which were used to carry Bibles, primarily by men.

Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."