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

The world's longest and deepest train tunnel.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

This ancient oak tree plays matchmaker for singles willing to branch out from the usual dating scene.

This monument to those fallen in the World Wars is accompanied by a U-boat that Germany bought for a Deutsche Mark.

One of the last remaining railway viaducts equipped with a transporter ferry.

Model Trains and Much More in Hamburg.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Hamburgers are intensely proud of their tunnel beneath the river.

This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

Remnants of an exploded schooner and wrecked submarines form a breakwater.

This towering statue of Jesus provided internet to the surrounding area.

What was once an underground Nazi city is now Europe's largest bat reserve.