These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

This conical hill was built as a testing ground for an engineer known as the Glider King.

A 12th-century fortress containing some of Berlin's oldest buildings.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

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

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

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

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

Every equinox this Maya pyramid puts on a spooky ancient light show.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

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

Art and a pun, all in one.

This monumental work of art symbolizes the coming together of a previously divided city.

A remarkable feat of Victorian engineering across the Firth of Forth.

A distinctive building that incorporates a mythical beast into its architecture.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

This church is named for one of the most dramatic tales in the early Christian church.