Complex sentence: Though little remains of the Tequesta society, a site of archeological importance called the Miami Circle was discovered in 1998 in downtown Miami, that may be the remains of a Tequesta structure.
Split into simpler sentences: Though little remains of the Tequesta society, a site of archeological importance called the Miami Circle was discovered in 1998 in downtown Miami. It may be the remains of a Tequesta structure.