The Deep Hole
The savannah wetland is a unique a common landscape in FL. Much of the time they are associated with "sinks." A good example is the Alauchua Sink - a large sink hole that connects the Floridan Aquifer to the surface near Gainesville, FL. Another such example known only as the deep hole, connects the Floridan Aquifer to the surface 130 feet above. Its location is on the lower lake of the Myakka River - Florida wild and scenic river in the state park preserve named after the river.
The best way to see the deep hole a 7 mile canoe trip down the Myakka which after about 3 turns into a wetland savannah teaming with wildlife. Some of the gators that had to be navigated around matched the length of my canoe and my canoe was a 17 foot Old Town. A unique place.

Image taken in December 1984 in dry season when the river was low but the Deep Hole kept the savannah wet. Camera Zone VI 4x5 view camera,
TriX sheet film developed in HC110 Solution B