Possibly the oldest living thing in Europe, more likely a pagan survivor.

An exceptional engineering feat that facilitates the migration of salmon upstream during their breeding season.

Ancient catacombs form the foundation for this Rococo orgy of a church.

This historic streetcar system has been running since the 19th-century.

Elaborate tile work in this railway station tells the story of Portugal.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

This ruined travelers shelter sits abandoned in a desolate bog of Flow Country.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Twice a year, this Orkney town hosts a rowdy game of medieval mob football.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

A sea cave with a waterfall and Viking past

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

This Shetland Islands bus shelter may be small, but it squeezes in a couch, a desk, some art, and even an old telly.

Across the islands, baked goods, sauces, and much more are for sale 24/7.

The rocky remains of an ancient Greek forest.

A book bound in the skin of an infamous criminal, along with countless other specimens.

A monument to the 70s rock icon stands on the road into this small Scottish town.

Vibrant paintings stretch across 600 feet of derelict railway.

These sculptures common among indigenous populations in North America, celebrate Shetland's unique geology.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.