These tenacious 14th-century towers defied demolition and are now a fairytale vacation rental.

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

This wooden hotel is a temple to German sustainability and forest conservation.

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

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

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

Renowned mathematician and physicist Carl Friedrich Gauss once worked at this observatory.

A staggering collection of satellite models and actual flight parts.

It commemorates one of the world's earliest telegraphs.

A 1:2 billion-scale solar system leads visitors into this German university town.

One of the oldest student jails in Germany.

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

These beautiful objects represent beautiful ideas.

Living trees form the structure of an open-air palace.

A small but immensely extravagant palace built by the "Night King."

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

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

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

In this truly magical place, rent hasn't been raised since the year 1520.

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

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

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

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