A unique, free-floating electric ferry may be the only of its kind in Europe.

This highrise residential building looks mundane, but hides a water tower and WWII bunker.

A unique bridge with an equally unique view.

This concrete church spent a period of its history as a World War II bunker.

This watchtower once presided over the Berlin Wall.

Home to the world’s oldest seismograph and a four-ton steel ball that makes its own earthquakes.

A monument to the "father of modern warfare" Gustav II Adolf.

One of the oldest student jails in Germany.

Largest illuminated advertisement sign in the world.

WWII rocket launchpad in rural Germany and site of operation backfire.

The highest cold-water geyser in the world.

This marvelous array is one of the largest collections of mechanical instruments in Europe.

Oberweissbacher Bergbahn - a broad-gauged cable car capable transfering railcars.

A famed artist's inspiring work of peace and tolerance.

The world's first and only three-segment bascule bridge folds up into the shape of a capital "N" to let boat traffic through.

Art installations, derelict railcars, and endangered grasshoppers all call this south Berlin park home.

A remarkable two-country morph, this town is part of Germany legally but is by all other measures Swiss.

One of the only spherical 19th century gas containers left today.

A simple tribute to the microscopic arachnid that gives its juices and its life to help make a speciality German cheese.

This medieval cathedral houses stained-glass windows featuring saints and pretzels.

Medieval ruins on a tiny island amid a flooded lake offer romantic respite to lovers seeking privacy.

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

This museum is home to a sugar sculpture of the Berlin Airlift Memorial.

Amöneburg is a town perched on top of a basalt mountain in the middle of an ancient meteor crater.