There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

An ethereal glowing blue ocean cave in Croatia.

This small Slovenian town has become a magnet for microbreweries.

Nibble as you learn about Slovenia's longstanding tradition of making beautiful honey cookies.

A crumbling World War I fort that is reached through a series of concrete tunnels.

A miniature train-ride through Slovenia's largest cave system.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

An ADA-accessible trail and deck offering stunning views of Colorado’s Mount of the Holy Cross.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

While comics are the main attraction at this megastore, the second floor plays host to an exhibit fit for a museum.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

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

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

An underground city of salt.

Remains of a station that only operated for one year.

This stunning mountain lake was named for a pair of tragic lovers whose statues stand at the center.

An open-air museum of 18th-century homes and churches transported from various villages in Southern Poland.

One of the most valuable palace-garden complexes in the eastern borderlands—and one of the most haunted.