A tree grown from astronaut seeds which were exposed to cosmic rays.

A small town hallucinates en masse - Bad bread, or CIA science project?

Volcanic irregularity? Odd erosion? Alien eggs? Local legends compete to explain these strange orbs.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

The first declared National Monument in the United States.

Natural rock formation, or biblical artifact that saved Earth's wildlife two by two?

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

The Yonaguni Monument, a natural formation or the Japanese Atlantis?

Bohol's mysterious brown hills.

Nature’s skyscraper launches out of the terrain with attitude.

The world's oldest rose is so tough it survived being bombed in World War II.

This picturesque round lake is said to be home to the legendary Mokèlé-mbèmbé.

A unique waterfall that some believe attracts the fairfolk.

This tangled English forest looks like something right out of a fairytale.

The Twisted Trees of Alticane are an unnerving grove of Quaking Aspen, apparently mutated from a single source, giving them a twisted and unnatural appearance.

A 120-year-old legend concerning an empty circular patch in the North Carolina woods.

This large round boulder is said to emit spiritual power, but it may just be magnets.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

A battle between nature and architecture in the Cambodian jungle.

Constantly maintained, this organ is playing a six-century long composition by John Cage.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

The world's largest Tibetan refugee settlement.