The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

This former Soviet military base has over 10 original aircraft and an enormous amount of memorabilia on display.

A small part of Russia that does not touch any other part of Russia.

This monument commemorates the soldiers who fought for 16 hours straight to penetrate this concrete fort.

Gdańsk's lion mascot features in a trail of bronze sculptures scattered all across the city.

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

Deep in a Polish forest, this collection of Iron Age megaliths still holds onto many of its ancient secrets.

A popular swimming hole that hides one of America's most deadly diving spots.

The reason for the strange contortions in the trunks of these "drunken" pine trees in Russia is still a mystery.

These tiny cabins on a cableway have been carrying visitors at a Baltic resort down to the beach since 1912.

During the renovation of this bas-relief, the constructors added one unusual element.

This antique thermometer honors the creator of the first universal temperature scale.

This museum in the tower of the oldest church in Gdańsk, is home to centuries-old time-keeping devices and the world's first pulsar clock.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

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

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

A tiny island is connected to the mainland by a private railway that residents travel in their own personal wagons.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

This "floating railway" is one of the world's oldest monorail systems.

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

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.