An unfinished tomb carved into a giant boulder in the Arabian Desert.

The vertical-axis windmills of ancient Persia have been grinding flour for 1,000 years and counting.

The ancient necropolis houses the immense rock-cut tombs of four Persian kings.

A sophisticated astronomical tower built by one of the greatest Persian scholars of the Islamic Golden Age.

The palace of the King of Kings, burned by Alexander the Great.

Once an impressive link to Afghanistan’s Buddhist past, now a sad reminder of intolerance towards other cultures.

This famed Silk Road oasis was one of the largest cities in the world before it was destroyed by a Mongol horde.

This was once the largest city in Kazakhstan, and a major stop on the Silk Road.

Nicknamed Kazakhstan's Grand Canyon, this natural wonder lies east of Almaty near the Chinese border.

Mysterious spherical rocks in the semi-desert of western Kazakhstan.

4,000 monkeys used for medical testing on an island off of South Carolina.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.

One of the best places to see feral Colonial Spanish Mustangs in the United States.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

This bridge is haunted by the ghost of a distraught mother.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

A mysterious inscription may hold a clue about the "Lost Colony" of Roanoke.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

Healing Springs that once ran red with soldiers' blood.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

An impressive collection is dedicated to the legendary beast.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

One of the last active volcanoes on the Eastern seaboard.

A Winnebago Tribe collection featuring arrowheads, artwork, and a mysterious rock carving.