A close look reveals that the Scottish monument is just slightly off-kilter.

This single-track road rewards brave drivers with stunning Scottish scenery.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

The last inhabitants of one of the U.K.'s most remote islands were evacuated in 1930.

A natural wonder in south Denmark.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

This abandoned five-star hotel is now a five-star urban exploration destination.

A condensed piece of China floating in a Dutch harbor.

Four giant movable street lights decorate this modern Rotterdam square.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

The 20-mile causeway that separates the Netherlands from the sea.

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

Atop this former dutch railway office sits an interstellar work of art.

A modern reimagining of a medieval city gate.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

A dramatic art installation features a BMW flying out of a building in Rotterdam.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.