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

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

Volcanically heated hot springs.

A 125-meter long "tribute to the Brazilian people."

Ain't no party like a ghost town party.

A remarkable geological formation resembling a forest made of stone.

Famously misunderstood wonder of the ancient world

Temple of a million beers.

Rising from the sea like a stone monster.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

Medicinal spa created with the discharge from a geothermal energy plant.

Myanmar's Mount Olympus atop a 2,500-foot volcanic plug.

The second largest reclining Buddha in the world got "lost" for over 120 years.

A seemingly endless landscape of pure salt stretches far across Bolivia.

A blooming house of worship for the masses.

Old and brave breed of warhorses known for their elegant, curved ears.

Sacred Indian temple that’s all monkey business.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

Hub for hallucinogenic Amazon religion.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

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

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

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