Today, we take a look at these 15 unsolved mysteries that cannot be explained. Unsolved mysteries have always intrigued people because they represent the unknown and the unexplained, which can be both fascinating and unsettling. Humans are naturally curious creatures, and we are always looking for answers to the questions that intrigue us.

The Palpa flat mountain, along with the Palpa Lines or Palpa geoglyphs, is a mysterious site located in the Palpa province of Peru. The designs are formed by the exposure of the lighter-colored soil underneath and can range in size from a few feet to over five hundred feet in length.