Most know that ants dig in the dirt, or maybe they live in a decaying log. But ant nest diversity is vast.
Some ants make "carton" a paper-like substance used to construct nests in trees. Other ants use the silk of their larvae to bind leaves together for a green living nest. Some ground-nesting ants build flood levies in concentric circles to protect the entrance from monsoon rains. And of course, there are the wood ants who make massive mounds of pine needles.
Ants made all of these!