Ben McDaniel — Certified Cave Diver Enters Underwater Cave, Never Surfaces

On August 18, 2010, Ben McDaniel, a 30-year-old diver who had recently obtained his cave diving certification, entered Vortex Spring, a popular recreational dive park in Florida, and passed through a restriction gate into an advanced cave system called "the Hole" that requires advanced certification he did not yet possess. He was never seen again.

McDaniel had been living at Vortex Spring for weeks, working on the property and diving obsessively. Staff and other divers noted that he was determined to penetrate deeper into the cave system than his certification level permitted. He had made multiple previous dives into restricted areas, and staff had warned him repeatedly.

Two professional cave diving recovery specialists were brought in to search the cave. They penetrated approximately 1,300 feet into the system — a distance requiring considerable expertise — without finding a body, equipment, or any sign of McDaniel. The cave was searched multiple additional times over subsequent years with the same result.

The mystery deepened because certified cave divers exploring the system found no remains in the areas Ben would have had to traverse, and the cave has multiple known dead ends and sumps. Some investigators have suggested the cave's passages are more extensive than charted and that he may have become lost in unexplored sections. Others have proposed he staged his disappearance. No evidence of either scenario has been confirmed.