This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Romania's triumphal arch looks out over Bucharest.

The unusual sculptures are believed to be powerful political symbols.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

A misnamed well, with a deep dark past.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

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

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

Europe’s most powerful hot spring supplies the surrounding region with hot water.

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

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

A sulfuric martian landscape that looks far better than it smells.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

This elegant arc of a waterfall marks a religious turning point.