05/19/2026
The Miami Circle is one of the most unusual archaeological discoveries ever made in downtown Miami. Unearthed in 1998 during preparations for a luxury condominium project, the site revealed a massive circular pattern carved directly into the limestone bedrock beside the Miami River. The formation measures about 38 feet across and contains 24 large holes along with hundreds of smaller ones, leading archaeologists to believe it may have supported a large wooden structure built by the ancient Tequesta people thousands of years ago.
Excavations led by archaeologist Robert S. Carr uncovered the circle beneath layers of shell middens and debris left behind by modern construction. Many researchers interpret the holes as postholes for a ceremonial or residential structure, though the site remains controversial because the rectangular holes cut into limestone are unlike most known Native American building methods in Florida. Other theories have suggested everything from a prehistoric astronomical site to the remains of a modern septic system installed in the 1950s. Some theories even proposed connections to the ancient Maya due to similarities in circular planning and coastal trade routes.
Despite debate over its exact purpose, the site is widely considered one of the most significant prehistoric discoveries in the southeastern United States. Public pressure and fundraising efforts ultimately saved the location from destruction, and today the Miami Circle is preserved as a protected archaeological landmark overlooking the river in downtown Miami.