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

A rare chance to ride one of the few continuous elevators still in operation.

A former ironworks that was the first UNESCO industrial site.

This Rococo church is known as the most beautiful village church in the world, and does not disappoint.

A meteorite-bounded town in Bavaria.

Hamburgers are intensely proud of their tunnel beneath the river.

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

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

An industrial relic is now one of Europe's most staggering art spaces.

Retirement home for giant obsolete machines.

This former steel and coal plant is now a neon-lit industrial fantasia.

The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

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

No need to strap in for a "ride" on this walkable roller coaster.

The prototype for all Nazi concentration camps.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

This "floating railway" is one of the world's oldest monorail systems.

"The most colorful grottoes of the world.

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

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

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

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

An abandoned NSA listening post on Berlin's "Devil's Mountain."