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

The world's biggest floating museum in Gothenburg, Sweden.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

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

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

The site of the first battle of World War II.

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.

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

In the summer, the area around this sculpture transforms into a vibrant concert venue.

These 18th-century paintings of Warsaw were used to reconstruct the city after World War II.

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

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

Real bones which are said to have belonged to a Polish dragon.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

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

The modern birthplace of Irish freedom.

Experience what life was like in Ireland during the Viking and medieval ages.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

One of Ireland's most infamous prisons for rebels including men, women and children.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

One of the most controversial statues in Romania is an emperor with no clothes.

Romania's triumphal arch looks out over Bucharest.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.