A comprehensive lidar-assisted survey of the Mound Bottom site in Middle Tennessee has identified previously unknown Thunderbird dance floors—massive, circular areas leveled and paved with a mixture of crushed white shell and limestone. These specialized plazas were dedicated to the Mississippian "Spring Awakening" festivals, where dancers petitioned sky spirits for the rains necessary for the maize planting season. The white surfaces would have reflected moonlight, creating a dramatic stage for nocturnal ceremonies.
Analysis of the plaza perimeters revealed hundreds of post-holes for temporary structures, likely used as vendor stalls or shelters for visiting delegations, indicating that these festivals were significant regional economic events. The discovery of charred tobacco seeds and ritual pipe fragments nearby suggests that communal smoking was a central part of the liturgy. This find underscores the sophisticated organization of pre-colonial festival circuits in North America.