Madeira is a volcanic Atlantic archipelago where steep island walls, clear water, and a growing network of marine protected areas create varied underwater days for a compact trip. Base yourself around Funchal or Canico for easy access to the Garajau Marine Reserve, then add boat dives to Cabo Girao and a day trip to Porto Santo for artificial reefs and wrecks. Expect relaxed, photo-friendly dives with big groupers in protected zones, plus lava fingers, caves, and blue-water drop-offs. Water is diveable year-round, roughly 18°C to 24°C, so wetsuit thickness depends more on season and your cold tolerance. On land, Madeira is a hikers paradise of levada trails, mountain ridgelines, and black-sand coves, with reliable whale and dolphin watching off the south coast.