Jacobs Well, Wimberley, TX
Jacobs Wells is the entrance to the longest underwater cave system in Texas.
The hole itself is small, just 12 feet across, but has been carefully crafted by nature to create a deep enough (35 feet) splash point for those daring to take a high leap from the rocks above
Jacob's Well is indeed a beautiful place. I have made many cave dives down into the hole. Here is a video of one of those dives.