Remote, beautiful, and stigmatized, Las Hurdes is Spain's version of Appalachia.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

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

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

A subterranean Holocaust refuge within one of the world's longest cave systems.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

A failed attempt to control drifting sands yielded a gnarled sylvan wonderland.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

In legend, this ancient dolmen was said to have been created when a troll tried to destroy a church.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

A natural wonder in south Denmark.

This remote island village was in danger of depopulating completely until a tunnel was built to connect it to the rest of the world .

The hermits of Karoulia protect their asocial lifestyles by living on the vertical face of a treacherous precipice.

This remarkable cave was discovered after a shepherd watched bees enter and exit through a small fissure.

The hallucinogenic center of the ancient world.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The largest portal tomb in Europe has a capstone weighing around 150 tons.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.