There are two dozen tanks just sitting in an open field in Lower Saxony.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

A wunderkammer of exoticism immortalized by Tom Waits.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

This collection of Dwarf beech trees were once believed to be enchanted trolls in disguise.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

Micro-nation based around a nine-story high illegally built tower.

Walking through this narrow gorge will make you feel like you've fallen into a fairytale landscape.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

Amalfi's pre-industrial history is slowly being engulfed by the lush vegetation of the Ferriere Valley.

The glowing blue Nymphaeum of Emperor Tiberius.

The Emperor Tiberius' palace of debauchery.

This clifftop arch is a natural stunner.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.