Fossilized Tracks

While walking in the desert, you happen upon some mysterious tracks. Are they ancient tracks made by the builders before you? Are they tracks from an ancient chicken? Could they be the ancient tracks from a long ago pillager party en-route to there next village to pillage? Perhaps these tracks lead to some sort of treasure, or a dark entity that is waiting to be reawoken.

These tracks could be varied, and would either keep going and lead you to something, or suddenly stop. The random chances that these tracks continue or suddenly stop will make finding these tracks more exciting, as you wouldn't know if they are going to continue or not.