An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

The ruins of an abandoned crematorium haunt an eerie deserted German cemetery.

This East German military command bunker was ready for World War III.

Retirement home for giant obsolete machines.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

A seemingly endless landscape of pure salt stretches far across Bolivia.

Surreal riveted sea forts once protected the Kent shores from German attack.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The drama of nature in full effect in this Nevada State Park.

The Dalai Lama named this New Zealand landscape the "Spiritual Center of the Universe."

An abandoned saucer-shaped monument in the Bulgarian mountains.

A spiral staircase twists to the top of this unusual Czech lookout tower.

A former utopian healing center created by a huckster and built by derelicts.

This crumbling folly looks like an enchanted left over from Middle Earth.

Intensely colorful calcite pools in Southern China.

This impressive tunnel was dug entirely by hand over the course of 36 years.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A massive wintry wall of snow up to 66 feet tall flanks a highway through Japan's mountains.

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

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

This medieval Italian town is a sheer (and beautiful) cliffside defense.

One of only two pod-shaped homes designed by Frank Lloyd Wright.

The entire length of the border is marked by a 20-foot-wide slash through the trees.