Built to hold the worst of the worst of the Nazi war prisoners.

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

Home to secret Eastern Bloc spy equipment and the largest stretch of the original Berlin Wall outside of Germany.

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

The signs of a long buried road can still be found hidden beneath a London sewer grate.

Fantastic views and thousands of love locks.

Dancing skeletal figures pay homage to a medieval mural destroyed during World War II.

A tilted half-timbered house from 1672 is built into a salvaged segment of a medieval wall.

A stunning two-story timepiece within a medieval Brick Gothic church.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

Made from trees and then abandoned, this fence is still growing along a path in Germany.

The remains of three Luftwaffe launch pads designed for manned anti-aircraft missiles.

This dockworkers' lunch joint has been left leaning by a century of storm floods.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

Hamburgers are intensely proud of their tunnel beneath the river.

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

A wunderkammer of exoticism immortalized by Tom Waits.

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

The prototype for all Nazi concentration camps.

An intricate and amazing house built by architect Karl Junker.

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

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

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

Super-heavy Nazi architectural experiment.