Places rigor Wants to Go

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

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

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

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

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

This mysterious pig iron pillar does not rust, despite being weathered by the elements for centuries.

World's only telecommunication tower with a wooden pinnacle.

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

This 600-year-old home seems to defy physics.

The last bastion of Roman presence north of the Alps looms over a German town.

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

Built to test magnetically levitated elevators, the tower also boasts Germany's highest visitor platform.

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

Power line with pylons on huge concrete bases to prevent terrorist attacks.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

An ancient pagan site swirling with legends in the foothills of Franconian Switzerland.

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

When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

Dine amidst exotic plants at this former royal greenhouse.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Apartment complexes built into huge repurposed natural gas tanks.

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.