A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Poland's oldest salt mine has nearly everything one needs to live underground forever.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Extremely isolated Silk Road caravanserai in the middle of nowhere.

The latest in a series of long glass bridges suspended at terrifying heights.

One of the most horrible legacies of the Cold War is a site where the Soviet Union tested nuclear bombs on civilians.

This highest bridge in the world spans such a great chasm that it had to be established using rockets.

This massive glowering Lenin head gazes out over eastern Siberia.

The tallest stationary dunes on Earth also happen to sing.

Enormous statue of the Emperor of the Mongols.

Siberian whale bones stand as cairns marking location of an ancient butcher yard.

The coldest city in the world.

The villagers of the coldest inhabited place on Earth adjust to unique challenges presented by day-to-day living.

Siberian ghost town built by gulag prisoners.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

Ancient rock-hewn town that witnessed key events of Georgian history.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

Staves, storm-calling, and of course, necropants.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

An Australian lake whose pink hue defies scientific explanation.