We really did find this in a grandfather’s backyard, among other* finds from the family dog. (*Includes but not limited to a dinosaur tooth, a chipped lamp, and the tip of a sword; all have since been sold.) But his exploring days are over, and he’d love to see someone else figure this out.
While the photo suggests the map is fully marked because someone folded it wrong and didn’t notice the error until much later into processing, the backside is entirely devoid of labels. It appears to be a parallel world to our own, as if someone traced the continents blind and shaded in the ocean as land. A small “X” around the reverse Bermuda Triangle may be of interest.
Disclaimer: Oxfam Shop assumes no liability for any of the following: damage that may happen to your persons by attempting to follow this map, inhuman explorers from uncharted otherworlds asking permission to borrow this map, ancient prophecies scrawled across the map in invisible ink, or otherwise fantastical consequences of owning this object. Use with discretion.