Building on shells: Unraveling mysteries of Calusa kingdom – Research News https://www.floridamuseum.ufl.edu/science/building-on-shells-unraveling-mysteries-of-calusa-kingdom/
Centuries before countries such as the United Arab Emirates and China started building islands, the Calusa Indians living in southwest Florida were piling shells into massive heaps to construct their own water-bound towns. One island in particular, Mound Key, was the capital of the Calusa kingdom
it in such a way that supported a large population,” said Thompson, an associate professor