The highest waterfall in Italy is only "turned on" five times a year.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

A unique form of erosion created an uncanny landscape of boulders perched atop slender columns of clay.

This decaying complex from the early 1900s was once the site of massive iron and fluorite mines.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

Spiral alpine structure provides an alternative experience of viewing the Matterhorn.

Medieval irrigation channels built into the sides of mountains provided Valais with water for hundreds of years.

The second-highest train station in Europe.

A historic observatory precariously perched at the "Top of Europe."

Caves famous for the dragon-slaying saint who lived there.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

Crumbling ruins of the thermal baths that once attracted royals and aristocrats from throughout Europe.

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

Part ski resort, part modern art space, this lodge brings giant metal spiders and bloody doors to the Austrian Alps.

These delicate sand pyramids look like naturally occurring gothic spires.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

These unique "earth pyramid" clay columns can be found in ravines around the village of Tirolo.

Bell tower juts out from a village buried under a lake.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

The stones of this formerly witch-obsessed castle were used to build a church.