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

Wonderland replication in progress by one persistent man.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

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

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Hang out with thousands of butterflies in one of the world's largest such enclosures.

Come in, light some incense, and ignore the live snakes around you.

Once the private home of China’s most legendary tycoon, getting inside this stunning mansion no longer requires an elite pedigree or acts of daring.

Malaysia's floating mosque.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Singapore's landscaping project is home to 18 incredible Supertrees.

A Buddhist theme park brings you a Buddhist version of Hell.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

Version of the French Riviera destroyed by the sea.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Golden Gate Park's historic collection of plants.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.