Jacob’s Well is one of the longest underwater caves in Texas. It’s basically a spring-fed pool that is made by the thousands of gallons of water per minute that surge up into the well. The well acts as headwaters to Cypress
Tham Lod is a piece Mother Nature's masterpieces in the Mae Hong Son region of Northern Thailand. The Lod is a natural limestone cave system, its main feature is the freshwater stream which runs through the middle of the cave for about meters.