In large and beautiful castles live not only fabulous kings, but also ordinary insects. For example, termites. They themselves are tiny (a little more than ants), but they build huge multi-tiered structures in the forests.
First, termites prepare a special mixture of sawdust and their saliva. When the mixture hardens, the termites make a column out of it. Then they will connect it with a bridge with another column. And they erect such columns until a large and beautiful castle is obtained. By the way, termites use it not only for housing - they still grow special mushrooms there, which they then regale themselves on.
And owls, woodpeckers, foxes and other animals like to settle in destroyed termite mounds.