Vortex Spring is a commercially operated recreation, camping and dive park located near Ponce de Leon, Florida. It is the largest diving facility in the state of Florida.
The spring
Vortex Spring is a cold, freshwater spring that produces approximately of water daily. The spring consists of a basin with sloping sides and a cave which links the spring to the Floridan aquifer. Water temperature is steady at with no thermocline, and is typically very clear. The spring runoff flows into nearby Otter Creek, which joins Sandy Creek a short distance upstream of Ponce de Leon Spring. There are many fish in the spring; large carp swim in the basin while freshwater eels live in the cave. The cave has been measured to a total of.
Diving
Vortex Spring is a popular diving area both for experienced and novice divers. Dive training is offered at the park. There are two underwater training platforms at which are often used for Open Water certification dives, and a "talk box" that divers swim into, allowing them to talk to each other while under the surface. The cavern entrance is at below the surface, and has an opening of. A handrail is mounted along the wall of the cave. The cave is accessible to, further passage is blocked by a steel grate. Experienced divers are allowed to dive to.
The cave has been a controversial aspect of the spring. During the early 1990s, 13 divers died while exploring it. The state of Florida threatened to ban diving near cave entrances as a result of frequent cave diving accidents, but local divers responded by developing a special cave diving certification that became the standard requirement for sections of underwater caves known to be particularly hazardous. Vortex Spring complied with this by erecting a locked underwater gate at the entrance to the dangerous section of the cave. Only those who have valid cave diving certificates are permitted to enter, requiring a staff member to unlock the gate, and typically accompany them during the dive. File:Vortex Spring cave warning sign.jpg|thumb|right|Warning sign near the entrance to the cave|alt=A white warning sign with a picture of the and the headline "Prevent your death. Go no farther" over black text explaining the dangers to divers of proceeding into the cave without proper equipment and certification In 2010, Ben McDaniel, a diver who was not certified for cave diving, but had been witnessed by staff and other divers gaining access to the restricted area of the cave by forcing open the gate, did not resurface after an employee let him through the gate one evening. It was initially assumed that he had died accidentally after becoming trapped underwater, but extensive searches did not find his body, nor any sign that one was present in the remote recesses of the cave. The only significant evidence that was found were two decompression tanks filled with plain air. The discovery of the tanks raised suspicions further because, in addition to being filled with the wrong type of gas, they were found just outside the entrance to the cave, though experienced divers know to place tanks close by to the areas they'll be exploring further down, thus keeping them within easy reach in case of emergency. This was seen as odd, considering that McDaniel was last seen deep inside the cave, attempting to bypass the gate to the restricted section by a diving staff member exiting the cave, who then unlocked it for him despite his lack of certification or diving partner. The staff diver then left, witnessing McDaniel entering the restricted zone. It has been speculated that he may have been murdered, and that his body was disposed of elsewhere. Another theory is that McDaniel staged his own disappearance to start a new life free from the many personal and financial problems he had been having at the time. Yet another possibility is that McDaniel did simply die by accident, and that his body still lies somewhere in the deepest parts of the cave, which are extremely difficult to access. In 2012, another diver died in the cave, believed by those who recovered him to have been searching for McDaniel's body, motivated by a large reward offered by McDaniel's parents, which they rescinded after news of the event.
