Here's another picture from our adventure to Ginnie Springs. Here you can see the hole through the limestone rock (called a vent) from which the water emerges. This waterway flows into a nearby river, and the entire area is great for tubing, camping, paddleboarding, hiking, swimming, snorkeling, and even scuba diving in the larger vents.
Ginnie is one of my favorite springs. Parties can get a little wild at night there, but it's always a good time.