Jacob’s Well, Texas. Jacob’s well is a 12-foot wide perennial spring, just outside of Wimberly, Texas. The well’s one of the creepiest places on earth, pretty much because it goes down 30 feet then levels off into an expansive underwater tunnel system that stretches for miles. So far, at least 8 divers have died in the system trying to map and explore the caves. Imagine swimming in complete darkness, with your oxygen running low, you’re lost and confused and all you need is an air bubble to regain your composure, but there’s nowhere to stop and breathe. That’s my nightmare, right there.