A winding path built in secret on the edge of the continent.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

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

A beautiful geyser under environmental threat.

An alchemist's "magic door" stands in the middle of a Roman park.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Pompeii's less famous neighbor is still revealing her secrets.

This shop for all your super spy needs hides an educational secret.

A battle between nature and architecture in the Cambodian jungle.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

This structure among the trees was the result of divine inspiration.

Hollowed out cedar log tubs set in an ancient towering forest.

A spectacular cave and a beguiling lake.

Furniture tries to escape an abandoned building in San Francisco.

This shop specializes in oddities and Victorian-inspired wonders.

Ruins of a German Castle on top of a towering stone pillar.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The abandoned Japanese amusement park once loomed as a dystopian Disneyland.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

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