An intricately carved Viking church overlooks a glistening fjord.

A thin pane of glass keeps visitors from sliding off this futuristic skywalk.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

The fairy tale castle of the "fairy-tale king."

A communal oasis on Lake Zurich.

The many—66 to be exact—faces of the German forest.

Two nations form a rare four-sided border at the peak of a mountain, philosophical questions result.

This Rococo church is known as the most beautiful village church in the world, and does not disappoint.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

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

One English town's celebratory landmark spurred more trouble than anticipated.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

A Neolithic burial site built 1,000 years before Stonehenge.

This oak sculpture at the edge of a small woodland is nine feet tall and shrouded in mystery.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

This former abandoned hospital, a complex of stunning 19th century buildings, once housed 2,000 psychiatric patients.

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

Every May, townspeople welcome summer with a bizarre pagan parade led by a man wrapped in garlands.

A remarkable two-country morph, this town is part of Germany legally but is by all other measures Swiss.

An 11th-century fortress home to one of the most influential royal houses in medieval Europe.

The great Danube river starts here.

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.