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

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

Three columns of volcanic rock shoot out of the ocean.

This roadside attraction looks like a flying saucer parked atop the tundra.

World's strongest whirlpool.

Now in ruins, this abbey was the home of Tironensian monks for more than 400 years.

This Scottish burial tomb once held hundreds of ancient eagle bones.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

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

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

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.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

The footprint of a frustrated devil in Munich's Cathedral.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A serious museum dedicated to two German comedians.

An eerie, derelict amusement park in Berlin.

The oldest trees in Northern Germany.

The narrowest street in the world is in danger of closing up entirely.

In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

A historic steam train meanders along one of the most scenic rail routes in Germany's Black Forest.

On the coast of Sardinia, a once-great mining village is finding new life as a coastal resort town.

An eerie gravel road full of shards of red bricks leads to the ruins of a deserted factory.