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

A peculiar family mausoleum built by a German nobleman captivated by the occult.

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

The world’s narrowest house makes for an awkward, four-foot-wide living space.

An abandoned Nazi explosives plant founded by the inventor of dynamite is now an underground museum.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

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

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

A hidden art gallery in an abandoned Warsaw fort.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

Warsaw's fantastically preserved gasworks...almost.

Naturally formed rock city in Poland.

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.

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

The site of the first battle of World War II.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

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

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

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 vintage video game wonderland in downtown Reykjavik.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.