In a quiet neighborhood in the south of Berlin is one of the most ambitious social housing experiments of the 20th century.

In the summer of 1957, a massive architectural exhibition showed off the future of urban living in this German neighborhood.

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

The best bagels in Berlin are tucked away in an independent bookstore.

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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

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

Check the time in 145 countries at once with this East German relic.

Macabre astrological automaton clock dating to the late 1400s.

A church of bones, decorated with 40,000 human skeletons.

An enormous and lavish Gothic church in Czechia.

A hotel and restaurant serving as the mecca of kitsch.

A living lighting fixture.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

Foreign invaders almost left this lovely Caucasus palace alone—almost.

Mysterious hillside with a continuously burning natural fire.

A shrine of fire worship built on top of a natural flame.

Resonant stone, that has been played since prehistoric times.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

A massive collection of petroglyphs dating back some 40,000 years.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

For over two centuries, this palace served as a residence for the Holy Roman Inquisition's leaders, a courthouse, and a prison.