São Miguel is the largest and liveliest of the Azores, and the island most trips start with. Its volcanic craters hold the twin lakes of Sete Cidades and the wild Lagoa do Fogo, while Furnas steams with hot springs, fumaroles and a stew cooked underground. Add Europe’s only tea plantations, black-sand surf beaches and Ponta Delgada’s cobbled old town, and you have enough for a week without repeating yourself.