The pond is actually very normal. I live in a Karst area with sinkholes all around my high ground. The sinkholes result when the cave roof below gives way.
The sinkhole drains naturally unless the drainage fissures become plugged. When that happens, a pond will form.
That is reality down the street. The new property owner brought in a small dozser to clear the slopes and the residue got pushed into the bottom. He now has a pond. With this year’s extremely heavy rains, a large pond
Additionally, given the high water table in many parts of Florida, underground caverns are generally full of water.
Water from the ground obviously isn’t going to fill an already full cavern; however, material heavier than water will.
Thus, the neighboring pond level might go up for a while, when the water in the cavern is displaced.
I’m very happy that I don’t like in an area of Florida prone to sink holes. But a quick look at a map indicates that most of central Florida is. An amazing number of natural, circular ponds and lakes.