A monument to Poland's famous alleged UFO abduction case.

In northeastern Poland, the ruins of a massive granary overlook the Narew River.

This 13th century Gothic brick castle is the largest in the world by surface area.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

Boats must transform into railroad cars to navigate this Polish canal.

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

This imposing 20th-century castle was abandoned before it was ever completed.

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

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

A collection of old neon signs from all over Poland line a secluded courtyard.

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

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.

Warsaw's fantastically preserved gasworks...almost.

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

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

The site of the first battle of World War II.

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

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

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.

An underground city of salt.

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