Dramatic river bend surrounds a natural red-rocked pedestal.

This classic restaurant features a gorgeous mirror-clad room.

Rock-cut cave complex filled with ancient Buddhist artwork.

An old world fairytale-land with over 350 fairy folk figurines hidden amongst 800 year old cedars.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Catacombs turned marketplace.

360° views of the city plus five floors of optical illusions and hands-on science.

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

Famously misunderstood wonder of the ancient world

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

An exquisite tunnel of cascading flowers.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

Medicinal spa created with the discharge from a geothermal energy plant.

Stalactites and stalagmites in a beautifully lit cave.

Michael Heizer's masterwork in the Nevada Basin.

The sign at the garden gate reads: "These Plants Can Kill."

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

Thousands of well-dressed mummies below a monastery.

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

A picture-perfect town, perfect for blowing up.