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

A striking public sculpture representing the period of martial law in Communist Poland.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

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

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

This man-made mound monument was built out of soil from all across the Polish empire.

A 20th-century picture show in 3-D.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

Naturally formed rock city in Poland.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

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

An underground city of salt.

When the rain falls, this drain system turns into a musical instrument.

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

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A Cold War secret surveillance tower used to spy on radio communications.

This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

This renaissance château was home to an infamous witch hunter who sent a hundred suspected witches to their deaths.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

An enormous and lavish Gothic church in Czechia.

Tiny communists hammer away on the Olomouc Astronomical Clock.

A cheeky architectural easter egg.

Be(w)ar(e) the moat around this historic Czech castle.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.