Many tripods have the ability to invert the centerposts so as to hang the camera below the legs. Others like mine, a Manfrotto, have a mount for a head on the opposite end of the post for the same reason. It will also spread and lock the legs at much lower angles almost to and including flat on the ground.
Theres another variety with the reputation of a contortionist, is it Benbo?, that can put a camera darn near anywhere you want it within reason.