Made by: Termites
Materials: Dirt, mud, cellulose, saliva and/or dropping
Mound-building termites live in Africa, Australia and South America and the mounds they create are huge, as big as 30 meters in diameter. They come in a wide variety of shapes and sizes.
The tower like mounds are made of dirt or mud, cellulose, saliva and droppings from both the termites but also from different species living in its surroundings.
What found to be interesting was the structure of the mounds. They can be very complicated. Extensive system of tunnels and conduits serves as a ventilation system for the underground nest of the mound and in order to get good ventilation, the termites will construct several shafts leading down to the cellar located beneath the nest.