After peering into murky water, we walk to the very end of the tunnel where a grand stairwell spirals down into a waiting room. A mammoth stone juts in the middle with an arched opening. Crouching through, on the other side we walk along a wooden plank above two watery caverns where, Carlo explains, the Sibyl once bathed and then gave her dual-meaning predictions.
Whatever the truth, the inky darkness illuminated by Carlo’s candles convinces everyone that Pluto himself likely roams close by.
