A good place to research the Freemasons, esoterica, occultism, and hermeticism.

Real bones which are said to have belonged to a Polish dragon.

An underground city of salt.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

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

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Go surfing on this urban wave, "hacked" by local surfers.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Baroque celebration of the end of the Great Plague of Vienna.

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

Waterway populated with abandoned projects, including a submarine.