These free-roaming horses were once destined to disappear from the land.

Britain's only herd of free-ranging reindeer.

Only 68 people per day are allowed to visit this New Zealand bird-watcher’s paradise.

These particularly resplendent rodents are the state animal of Maharashtra.

Thailand's distressed elephants find peace at this Chiang Mai sanctuary.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

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

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

The world's only museum devoted to the wonders of fluorescence.

An exquisite tunnel of cascading flowers.

On Japan's Tashirojima Island, cats are king.

Abandoned railway line circling the city of Paris.

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

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A magical place that lets you play in and explore the world of Studio Ghibli.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

World's first "penitentiary," meant to be humane, drove men insane.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

An emerald-green grotto just a short trip from Austin.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.