Termite mounds. They may look like just a big pile of well-structured dirt but they are actually marvels of architecture and fill an unexpectedly important function in the ecosystems in which they appear. In fact, the areas around termite mounds can be some of the most biologically diverse in an entire habitat.
From the functions they serve for termites to the functions they serve for other animal and plant life, termite mounds are mind-blowing.
(via Look At This...)