Fodor's Expert Review Ponta da Ferraria

This natural hot springs differs from the others on São Miguel because it’s actually in the ocean. Surrounded by basalt cliffs, the cold ocean water mixes with the hot thermal water to create a unique bathing experience—just keep an eye on the tides, as at high tide, the waters can feel chilly, while at low tide they can be steamy. But time it right (there’s a Ferraria Hot Springs app that can help), and you’ll never want to leave. A footpath leads down to the volcanic rock pool and from there, a ladder will take you into the thermal waters. Though it’s fairly shallow, wearing waterproof shoes is a good idea, as the rocks can be sharp and slippery underneath. There are ropes to hold on to if needed, and lifeguards on duty.