At night, this memorial illuminates a ghostly outline of a footbridge that connected two sections of the Warsaw Ghetto.

This overlooked street light once served as a KGB dead letter box.

Epicurean and holy traditions converge in what may be the oldest restaurant in Europe.

The middle finger of modernity.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

A church of bones, decorated with 40,000 human skeletons.

A sign marks the plane crash that caused two nuclear bombs to fall in North Carolina.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

The second-highest train station in Europe.

A spiral staircase twists to the top of this unusual Czech lookout tower.

The world's first and only museum dedicated to dachshunds.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

This tiny home was originally a narrow alleyway.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

Catch a scenic view of Warsaw's Old Town from the top of a centuries-old dumping ground.

These plaques found across Warsaw commemorate the sites where executions or battles took place during the German occupation.

This mushroom-shaped rock has frustrated and fascinated locals for centuries.

A statue commemorating a Polish dog who took his role as man's best friend very seriously.

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.

This symbol of Polish heritage survived the occupation during World War II, hidden in plain sight.

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

An artificial date palm stands as a memorial to Warsaw's Jewish community.

Built to transport German U-boats through the never-completed Masurian Canal, the locks near this Polish village are now home to a rope course.