Derelict airplane bodies serve as both home and income for three Thai families.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Inside the world's largest seed bank, WWII botanists elected to starve to death rather than compromise their collection.

This seaworthy collection was sparked by one man's passion for sailing.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

These cinderblock farmhouses were actually World War II radar stations in disguise.

What began with a single, 357-pound chunk of the Canyon Diablo meteorite grew to be an impressive collection. 

This elaborate hole in the ground was built as a sacred site for an ancient civilization.

This lost city belongs to one of the earliest civilizations in the world.

This beautiful system of tunnels built into natural rock serves as a centuries old plumbing system.

"Satisfying" is a good way to describe these beautifully aligned rows of Spanish mills.

Hundreds of caves once used to store grains and animal feed.

Seventeen oak trees sprout from the roof and walls of this tiny chapel without any visual evidence of roots.

This frequently-photographed waterfall takes only a short hike to visit.

Only a handful of these gorgeous historic waterwheels remain but even those are in danger from local unrest.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Massive prehistoric mammals used these stones as oversized scratching posts.

A city built from mud and known as the "Manhattan of the desert."

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

This striking, two-toned confluence of rivers is visible from space.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.