A massive sustainable farm designed by the mastermind behind Central Park.

A house carved into a rock in the 1940s.

Inside this mountain lies several kilometers of breathtaking caves.

What once claimed to be the world's tallest single-family wooden structure house.

Hundreds of Buddhas in a re-discovered Indonesian temple.

This country market harbors goats on its roof.

Old Danish castle immortalized in Shakespeare's Hamlet.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

Silent memorial, using bone conduction to take people back to the Dresden Bombing of 1945.

One of the oldest living oak trees in the Southeast.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

A mysterious light in the wood, rumoured to be the the ghost of a railroad brakeman.

The world's brightest bioluminescent bay.

Four-story concrete hotel never opened to customers.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A graffiti Mecca welcoming artists from around the world.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

Fascinating town where normal life interfaces with the occult.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Half of a waterfall goes into the river while the other half seems to disappear.

Once thought to be the Garden of Eden it holds a holy footprint claimed to belong to Adam, Buddha and Shiva.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Modest by day, illuminated majestically at sunset.