Sete Cidades is a crater five kilometres across on São Miguel, in the Azores, holding two lakes side by side — one blue, one green — with a village on the strip between them. They are the same body of water, joined under a low bridge. The green one is shallower and throws back the crater walls; the blue one is deeper and mirrors the sky. Before anyone explained it that way, the islands had a love story: a blue-eyed princess and a green-eyed shepherd, kept apart, who wept two lakes of tears. The colours belong to the morning. Cloud spills over the rim as the day goes on, often within three hours of sunrise, and both lakes flatten to the same grey.
The rim walk starts at Vista do Rei, the king's view, with the village and the bridge where the two colours meet straight below you. The path climbs the crest to Boca do Inferno, where you get four lagoons: the two big ones and smaller ponds in side craters, the ocean on the other side. All of that rim is working pasture. Its dirt tracks run for kilometres between stands of cryptomeria and hydrangea hedges that flower blue from June into September, and stables in the parish take you along them at walking pace. Down in the village the ground drops to the water in a few metres, and a flat path follows the shore past the canoe landing and cattle grazing to the edge. This is the one place in the caldera where you look up at the rim instead of down from it, and from a kayak the viewpoints shrink to notches on the skyline. One building was put up to sell all this. The Monte Palace, the first five-star hotel in the Azores, opened on the rim in 1989 and shut eighteen months later, the same week it was named the best hotel in Portugal. Its gutted shell still stands behind the railing at Vista do Rei, facing the view.