The silly symbol for an underground protest group is now scattered around the city.

Museum dedicated to "the man who moved the Earth."

A huge wooden clock that is so beautiful its creator was forcibly blinded.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

These massive moving sand dunes have swallowed an entire village and are still on the run.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A hidden art gallery in an abandoned Warsaw fort.

The site of the first battle of World War II.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

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

An underground city of salt.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

A huge communist-era propaganda monument and mural that offers stunning views of the Mongolian capital.

Traces of the thriving lake trade that once linked the Soviet Union with Mongolia.

A jagged silhouette of shamanistic stone heaps rises from the shore of this dazzling mile-high lake.

History, geography, and shamanism meet in this eye-catching monument to the greatness of three empires.

The oldest Buddhist monastery in Mongolia has survived centuries of invasions, political shifts, and religious purges.

A mysterious phallic rock on the grounds of a Buddhist monastery.

Enormous statue of the Emperor of the Mongols.

An exceptional assortment of fossils recovered from private collections.

An institution dedicated to curiosity, logic, riddles, and Mongolia's long history of puzzles.