The last bastion of Roman presence north of the Alps looms over a German town.

This peculiar museum offers hands-on interaction with seemingly intangible principles of mathematics.

Hamburgers are intensely proud of their tunnel beneath the river.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

It was once the base for a series of domestic terror attacks.

There’s a hidden military meme engraved on the World War II Memorial.

A collection of 16,000 antlers crammed beautifully into a small shed.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

The only road through the heart of Glacier National Park.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

Victorian "Fancy Craft" Hair Wreaths and Relics.

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

This museum offers an actual time machine back through Colorado's past.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

A downtown park built on top of unclaimed graves.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Once a black market electronics marketplace, now an otaku shopper's paradise.

After a profound show of devotion for his master, a dog becomes the symbol of loyalty for an entire nation.