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

Rippling sand dunes frozen in the Arizona rock.

Concentrated around the Dead Sea, these surprising canyons are filled with coursing water, fish, and even crabs.

A museum honoring Germany’s cucumber mecca offers a great dill of gherkin history.

This enormous abandoned prison was once dubbed the "Bastille of Romania."

A charming beach town in Turkey captures all the colors of the rainbow.

The abandoned ruins of a failed resort hide on this verdant, picture-perfect island.

An abandoned swimming pool decays on the outskirts of Berlin.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

This sublime architectural marvel is a rare example of an expressionist church.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

It's always summer at the beach inside this former airship hangar.

Terrifying derelict military hospital once housed a recuperating Hitler.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

A fascinating insight into daily life in the Eastern Bloc.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

The mystery of the Putim Ossuary involves a tricorn hat.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

David Sedaris called it "The greatest shop in the world."

One of the world's heaviest musical instruments towers within a popular urban park.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

"Unity, Creativity, Beauty."

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.