This oddly beautiful water cistern is a techno-temple to the wet stuff and a multimedia masterpiece.

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

An abandoned Jewish sanatorium is tucked within the woods of Poland.

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

The coffin-shaped church was once home to monks who slept in coffins.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

The site of the first battle of World War II.

This Communist-era residential block is one of the longest residential building in Europe.

A haunting deserted hotel is a favorite with artists and photographers.

Inside the dome of this gigantic, Saturn-shaped building is one of the largest planetariums in Asia.

The home of the morbid art of corpse plastination is open for visitors to view the fascinating, but stomach-churning process.

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

What was once an underground Nazi city is now Europe's largest bat reserve.

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

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

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

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

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

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

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

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

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

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

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