The hidden lair of an alchemist rediscovered in a 2002 flood.

A Jenga-style cylindrical tower of books that appears to go on forever.

Countless grotesque faces stare out from this eerie Prague art wall.

Two stunning 17th-century libraries and a cabinet of curiosities.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Complete town of 5,000 living out at sea on the world's first offshore oil platform.

The village's cobblestone streets are lined with shops displaying exquisite copper craftsmanship.

Local legend says that whoever burns down this 2,000-year-old tree will only have seven days to live.

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

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

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

What might be the largest completely Jewish town in the world outside of Israel now faces dwindling numbers and empty streets.

Azerbaijani ghost town, decaying after a war left it an armed forces buffer zone.

Spring that emits water and fire at the same time is said to have remedial properties, and sparked its own religion.

A unique museum dedicated to culture and artistry of carpet weaving.

Swirling layers of white and red rock earned these mountains their festive nickname.

A gigantic collection of teeny, tiny books.

Resonant stone, that has been played since prehistoric times.

A quirky house created entirely out of glass bottles combines a collector's spirit with an artist's flair.

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

This striking icon of the disputed Republic of Artsakh caused a stir at a Eurovision Song Contest.

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

Mysterious hillside with a continuously burning natural fire.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.