Hidden in a high mountain cave, this hermitage dates back to the ninth century.

One of the four sanctuaries of Rieti's Holy Valley was the site of the first living nativity scene.

A dreamlike medieval church dug into the tuff rock, with unusual carvings and possible traces of the Templar knights.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

A unique geological area spiked with wind-carved rocks that resemble teepees.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

Its history includes dinosaur fossils, cattle rustlers, Georgia O'Keeffe, and a mythical giant rattlesnake named Vivaron.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

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

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

A massive underwater sinkhole made famous by Jacques Cousteau.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

A magical world of elves and fairies tucked amongst the trees in Colombia.

This collection of ancient, mountaintop, underground tombs was once hidden by decades of bloodshed.

If you've ever wondered at which cycle of the moon you’re supposed to spread manure produced by your guinea pigs, this is the place for you.

A swing to dangle you off the very edge.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.