Castillo Holiday Open House

Get into the holiday spirit by visiting the Castillo de San Marcos Open House, an annual tradition, from 6 p.m. This event is free, and visitors will have the opportunity to explore the fort by lantern light and learn about its 300-year-old history by talking with park volunteers and staff. There will be cannon firings at 6 p.m., 7:30 p.m. and 8:30 p.m.