A tower-like theater in the Swiss Alps built to withstand the high winds and avalanches of the mountain pass.

See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

The steepest classic funicular in the world glides along a dizzying incline.

A cablecar-station-turned-revolving restaurant with 360-degree views of the Swiss skyline.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

An 11th-century fortress home to one of the most influential royal houses in medieval Europe.

These spooky and unusual stone formations create an underworldly landscape.

Though it may look like a businessman's lost luggage, this case suspended under a highway bridge is actually a contemporary art installation.

The second-highest train station in Europe.

Come stay at a live-in art installation.

A wunderkammer of mysterious objects and stories.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

This "flat geyser" bubbles up out of the ground periodically like a disappearing river.

This historical manor is complete with a magnificent garden.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

Bioluminescent firefly squid light up this Japanese fishing port.

The magical, mossy forest that inspired Princess Mononoke.

Hot springs monkey spa in the middle of Hell's Valley.

On Japan's Tashirojima Island, cats are king.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.