Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

Perhaps the most spectacular grotto along the Algarve coastline.

Dead weights honor the dead of Portugal's fishing industry.

The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

This small chapel is built of human bones and decorated with a golden skeleton.

This suburban British town holds secrets that would have made the druids proud.

This church is considered the largest and most complete Saxon church in England.

The alleged birthplace of Lady Jane Grey, who was executed at age 16 for claiming the throne of England.

This 20-foot mountain is made up of some 15,000 mannequins—if you visit, you can even take a piece home with you.

This English medieval castle is where King John died of dysentery.

This stone throne invites adventurers to observe breathtaking views of the Peak District.

A creepy tree with a local legend that inspired a nearby theme park ride.

These quintessentially English stepping stones were built for Victorian tourists.

This muddy wooded valley and the ancient structures it hides are said to be the favored haunt of the legendary Friar Tuck.

This unchanged Victorian park is rumored to have been the inspiration behind Peter Pan's Neverland.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

A striking 500-year-old mansion provides an unexpectedly sublime home for live deer and a menagerie of exotic stuffed animals.

The real life town from the Pied Piper of Hamelin has a mechanical puppet show that retells the famous story many times a day.

This ghost town in Belgium will lose its street art when it ceases to exist.

On a stretch of Danish coast known as "Cold Hawaii," this fishing village has become a surfing town.

These old World War II fortifications have been transformed into an unusual equine attraction.

A perfectly circular stronghold constructed in the 10th century is now a nucleus of Viking culture housing a museum, village, and reenactment of an epic Viking battle.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

This sublime architectural marvel is a rare example of an expressionist church.