The hidden ruins of an old hydroelectric plant reclaimed by nature.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

Tiny communists hammer away on the Olomouc Astronomical Clock.

Single runway interrupted by a busy road that cuts across its middle.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

Giant topiary dog once played a role in a terrorist bomb plot.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

This fortress was designed to prevent a Nazi invasion but was never used.

Enormous sandstone towers loom within a Czech forest.

The sanctuary holds what was once believed to be the saint's incorruptible tongue.

Over 12,000 hygiene oriented objects and exhibits.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Europe’s oldest natural human mummy.

This winding road through an Italian canyon may be the most scenic drive in the world.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Geothermal waterfalls in Tuscany.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

Bridge that died in war and was resurected.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”