Termite nests, which can be found either underground or above ground in mounds, are intricate structures built by social insect colonies. These nests, often constructed from soil, saliva, and wood, house various termite castes including reproductives (kings and queens), workers, and soldiers. Subterranean termites typically build nests underground, while others construct mounds in Africa and Australia. Arboreal termites build nests in trees, often using carton-like materials.

Fascinating how termites create complex societies with distinct castes, don't you think? Their engineering skills are impressive, from underground tunnels to intricate mounds and even tree-dwelling nests.