I intended for this to be a Wordless post, but it seems to be causing some confusion among my readers. This is a picture of an ant hill, not an ant lion's trap. An ant lion larva, aka doodlebug, builds a concave trap downward into the soil with no hole visible in the center. The ant lion larva then waits until an unsuspecting critter falls into the trap.
I watched the ants building this mound and I thought it had an interesting appearance. Sorry for any confusion!