The Baths is a pile of granite boulders the size of houses, stacked and leaning against one another along a Caribbean shore where you would expect only coral and sand. Some are twelve metres across, smooth grey-and-pink domes with no edges left on them. The stone cooled from magma deep underground about forty million years ago, and it was rounded down there, in the soil, before erosion stripped away the softer volcanic rock above and let it surface. Where the blocks settled against each other they left a maze of dim passages, arches and sea-filled grottoes. The best known is the Cathedral Room, where daylight slants through gaps overhead onto clear green water. Between the boulders the sea collects into shallow warm pools that gave the place its name. This granite jumble is the best-known natural landmark in the British Virgin Islands.
The way to know The Baths is on foot. A marked trail drops from the entrance toward Devil's Bay, and for stretches it stops being a path at all. You climb wooden ladders bolted to the rock, pull along fixed ropes, and wade knee-deep through seawater beneath boulders that block out the sky. Light bounces off the water onto the stone, and cool shadow trades with pockets of warm sun. The passage ends at Devil's Bay, an isolated white-sand cove where you can swim over a shallow reef and snorkel among fish and turtles in the shade of the rocks. The water stays warm all year, but timing beats season here. Cruise and ferry day-trippers land between about ten and two, so the clear light and near silence belong to whoever comes at dawn. Entry costs only a few dollars, and the wet granite underfoot is genuinely slippery.