Bassin Bleu is a staircase of four spring-fed basins cut into the limestone hills twelve kilometres above the coastal town of Jacmel, and the one everybody comes for sits at the end of it. Bassin Clair is 22.8 metres deep, takes a ten-metre waterfall straight down its throat, and wears maidenhair fern on every wall. The three you pass on the way in are lower steps of the same staircase — Bassin Cheval at 2.7 metres, Bassin Yes at 4.6, then Bassin Palmiste dropping to 17.4 — and the gorge tightens as it climbs. There is no path into the last pool. After a twenty-minute walk from the village you climb down a short rock face on a rope, hand over hand, while a guide anchors the line. Anyone who tried to find the true bottom, Jacmel will tell you, was taken by the nymphs who live in the grottoes.
The canyon holds its shade and the water stays cold, and the guides step off the ledges into it without much ceremony. The colour is not a constant, though: it belongs to the dry months. Runoff after a hard rain carries silt off the slopes and the basins go a flat muddy brown for days. Whether you can come at all is the harder question. Haiti has sat under a Level 4 "do not travel" advisory for years — armed groups hold most of Port-au-Prince, the capital's airport has no scheduled commercial service, and the overland road south crosses ground no visitor should cross. The pools themselves are not the danger; the country around them is, and foreign visits collapsed after 2018. For now Bassin Bleu belongs to the people of Jacmel, who still walk up on hot afternoons and jump in.