Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

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

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

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

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

A former Oz-themed attraction that has fallen into disrepair, but still holds some of the original magic.

An Austrian house of bones filled with hundreds of intricately painted skulls.

The world's oldest known salt mine.

This 19th century cyclorama acts like an analogue time machine to a different era.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

The former home of Norway's greatest romantic composer.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

For six months of the year, three giant mirrors direct a pool of sunshine onto this otherwise occluded town.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

Walk behind a 50-meter-high waterfall.

Walk 2,300 feet above the ground on the "Troll's Tongue."

Norway's chilly all ice-instrument festival.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

A Viking-style brewpub named for a Norse sea giant, in the heart of fjord country.