Swimming just inside the entrance to Actun Tunichil Muknal
When you arrive at the entrance it quickly becomes apparent why the cave remained a secret for so long. From a distance it looks like a cluster of rock and bush on the other side of a pool. It’s only after you get closer that the entrance is revealed, and then you need to slide in and swim over to the other side to see that this is indeed, as the ancient Maya put it, a portal to the underworld.
Photograph courtesy Chaa Creek
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