Jacob's Well -- Wimberly, Tx: One of the most significant natural geologic treasures in the Texas Hill Country. It is one of the longest underwater caves in Texas and an artesian spring. Jacob’s Well surges up thousands of gallons of water per minute! --Can this be our first road trip? I just google mapped it and it's about 4 hours away :) We could take some awesome pictures!
Hamilton Pool Nature Preserve (Dripping Springs, 37 miles on Highway 71 west of Austin, Texas) is one of the most beautiful places in the world. A subterranean lake coming to the surface from under the stone arch grotto is complemented with a waterfall.