A turquoise lake within a volcanic crater.

Sleep in a glass pod dangling off a cliff.

A charming museum of natural history featuring dioramas and exhibits made entirely by college students.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

A gargantuan crystal kingdom.

Walk 2,300 feet above the ground on the "Troll's Tongue."

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

An ethereal glowing blue ocean cave in Croatia.

A curious collection dedicated to human and animal anatomy and pathology.

A heavenly experience, right here on Terra Firma.

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

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

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

Stunning wetlands ablaze with pink lotus flowers.

Mysterious rocks that ring musically when struck.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.