This is the entrance to Castillo de San Marcos in St Augustine, Florida. I got here for this shot just after sunrise. For a couple of hundred years this draw bridge was a crucial link to the outside, and for weeks it would be raised as the fort was under siege. Possession of the fort has changed six times through various treaties over the centuries, yet it was never defeated in battle. However, if you come here a couple hours after sunrise, you just might be defeated by the tens of thousands that visit this sturdy bastion daily. I wonder if the Spanish had that in mind when they built it.