Model Trains and Much More in Hamburg.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

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

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Most-visited and most-photographed slot canyon in the American Southwest.

A 200-year-old building in the French Quarter that was to be Napoleon's home in the New World.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

A striking symbol of the Bulgarian capital.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Apartment complexes built into huge repurposed natural gas tanks.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

The monumental home of Prussia’s eccentric "Cannon King."

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

Metro station with a claim to rock n' roll fame.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Cold war icon and onetime "hole" in the iron curtain.

This 600-year-old home seems to defy physics.