Sinks of the Roundstone Cave & Spring, Kentucky

After Pine Hill Cave we drove up the road toward Sinks of the Roundstone when a blue hole resurgence appeared in a bluff — very large spring with crystal clear deep water. Research revealed this to be Blue Hole Cave, fed by Pine Hill Cave's watercourse — the water travels from Pine Hill into Blue Hole Cave, resurges out of the Blue Hole, and flows into Sinks of the Roundstone Cave. Three connected systems in the same watershed. Found the Sinks of the Roundstone entrance right before a tunnel — two additional entrances spotted nearby. Will return for a cave dive at Blue Hole in the future.