The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.

This 1960's Soviet submarine in Peenemünde Harbor claims to be the largest submarine museum in the world.

An elevator into the Baltic Sea.

The first (but not only) upside-down house in Germany.

A section of destroyed vertical lift bridge stands alone in the Peene river.

A stone in Wolin, Poland, marks the possible location of a legendary Viking fortress.

At nearly four meters tall, this giant potato looms over a small Polish town.

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

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

A tribute to the first human in space.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

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

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

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

Relive a Polish uprising via an enormous, century-old cyclorama.

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

Learn the fine art of making a centuries-old treat at this hands-on food museum.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

Down this Cracovian street resides a plaque with a stark message about the city's air pollution.

Inside this Krakow church, an explosion of psychedelic color.

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

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

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

A memorial to the beloved brown bear that served in the Polish army during World War II.