Striking occult iconography on a medieval German church.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

In this truly magical place, rent hasn't been raised since the year 1520.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

The prototype for all Nazi concentration camps.

A small but immensely extravagant palace built by the "Night King."

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

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

Two nations form a rare four-sided border at the peak of a mountain, philosophical questions result.

This ancient temple is set up to take you on a pilgrimage of self.

Hot springs monkey spa in the middle of Hell's Valley.

The busy transport hub is home to the tallest airport slide in the world.

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

Its humdrum facade only adds to its electrifying appeal: a rooftop with panoramic views of a shapeshifting metropolis.

A remnant of Korea's colonial past lies forgotten in a hip neighborhood in Seoul.

To enter the lower hall of this temple, you must first walk through a dragon.

A massive Montreal stadium that has seen nothing but trouble since its inception.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

Decorated by local artists, the city's utility boxes have become three-dimensional canvases.

This unique bridge has been a staple across the Saskatchewan River Valley for more than 100 years.

With its webbed walls and bright red coloring, Calgary's iconic bridge looks like a finger trap puzzle stretched across the river.

This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

The last timber and iron Chinese temple in Australia.