The origins of a large, medieval castle are shrouded in mystery, but now it's a delightful garden.

Known as the Royal Palace of the Euganean Hills, this often overlooked castle has been home for multiple noble families over the centuries.

This abandoned island off the Venetian coast has been a radical monastery, a political prison, and a secret Nazi base.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

Monkeys lounge around at this 13th century temple.

The incredible private taxidermy collection of an eccentric zoologist.

This roadside attraction looks like a flying saucer parked atop the tundra.

The pristine waters crossing this forest form a hidden waterfall among the dense vegetation.

This species of wild goat stars in witchy legends and frolics among the park's eerie rock formations.

A breathtaking and biodiverse wilderness in the mountain setting of Ernest Hemingway's "For Whom the Bell Tolls."

Tens of thousands of ancient rock carvings hidden in the heart of a French national park.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

The remains of an early 1900s dude ranch that operated until the 1970s.

Mountain where Jesus was first tempted by the Devil.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

Once the home of a hermetic monk, this cave now houses a small church.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Eastern Canada's ocean playground.

An ancient city exhumed from the depths of the ocean.

One of the most spectacular canyons in the world.