Thousands of coffin-like pillars make up this controversial Holocaust memorial.

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

A statue honors the children who fought Nazis in Poland.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

This colorful and quirky set of pegasus sculptures celebrate the works of poet Zbigniew Herbert.

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

The world’s narrowest house makes for an awkward, four-foot-wide living space.

The last king of Poland was interred in this church nearly 200 years after his death.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

This hidden collection of everyday objects illustrates life within communist Poland.

This unique architectural wonder is home to luxury apartments.

The final home of the legendary Danish sailor said to have lived to be 146 years old.

This inverted metropolis model is the artist's "revenge" for not being allowed to have a doll house as a kid.

A public display of random paleontology.

A symbol for the opposition to nuclear power around the world.

A medieval church built up to defend its village.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

You'll find the little birds tucked within the rocks of this Australian beach.