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

A statue honors the children who fought Nazis in Poland.

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

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

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.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

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

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

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

The world's largest wooden structure.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The only museum with its curator—and her pets—buried inside.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.