To Sua Ocean Trench in the Lotofaga village on the south coast of Upolu, Samoa. o Sua is a giant hole in Lotofaga that was converted into a swimming pool with water flowing through a lava-tube tunnel. WANT TO GO!
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!
Devil Spring - one of seven springs that are located in the private Ginnie Springs park (northern Florida), a cave divers paradise. For non-divers there is still plenty to see when snorkelling. The intense blue colour is due to the water depth at the cave
Near Gainesville Devil's Den Resort & Springs, Williston, FL. Walk down these steps and take a dip into a top secret pre-historic pool. One of the world's most epic natural dive spots, right here in the USA
Finally you can own a personal glass bottom boat. With the Clear Blue Hawaii Molokini Kayak it is technically not a glass bottom boat, but an entire kayak created out of clear polycarbonate with an aluminum frame. Imagine the fun of sliding along in this
Gorges de l'Areuse, Switzerland The Val de Travers is a Jura mountain valley perpendicular to the main valleys (hence the name). The river Areuse has cut itself steeply through the soft limestone and clay sediments. It's one of those Roman bridges too.
To Sua Ocean Trench, Samoa.Located in the village of Lotofaga in Samoa, “To Sua Ocean” is a small piece of paradise everybody should visit. The To Sua Ocean Trench is open to the public as a swimming area.