Houses are tucked between, on, and underneath giant boulders.

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Walk 2,300 feet above the ground on the "Troll's Tongue."

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

A curious cave church carved into the face of a cliff.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

Resting on a hill overlooking the coast, these medieval ruins look completely deserted save for their restored chapel.

These 18th century gardens tell a rocky story of the son of Odysseus.

Money made from smuggling sugar helped create this wondrous rock maze in honor of the Prussian Queen Louise.

A striking 12th-century-style castle built on the edge of a cliff.

The prototype for all Nazi concentration camps.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

The stones of this formerly witch-obsessed castle were used to build a church.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

The fairy tale castle of the "fairy-tale king."

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

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

These azure waters were thought to lead to the Mayan Underworld.

Extraordinary sculpture garden created by an eccentric English poet.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A gargantuan crystal kingdom.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.