Looks like water, but it's heat. Sits on sand, lays on concrete. People have been known, To follow it everywhere. But it gets them no place, And all they can do is stare.

Why this works

This riddle plays with the concept of a mirage, which is an optical illusion caused by atmospheric conditions. The first line, "Looks like water, but it's heat," refers to how a mirage can appear as shimmering water on hot surfaces, like asphalt or sand. The phrases "sits on sand, lays on concrete" highlight where mirages are commonly seen—hot, dry environments. Finally, "People have been known to follow it everywhere, but it gets them no place" indicates that, although people might chase after this illusion, they ultimately remain still and only observe it, as a mirage cannot be reached.