"At the Bird Key shipwreck you can go in and see the propeller and see the driveshaft—really, that's all that's left, other than this nice coral growth on the edge of the bank. The lighthouse on Loggerhead Key was erected to provide warning for ships that this really is a treacherous zone for shipping.

"This wreck goes back to the late 1800s when the fort and the lighthouse were built. There are all kinds of shipwrecks there; we saw maybe two or three different ones."

—Photographer Tim Calver