Portugal offers diving in the Algarve, Lisbon and Madeira. Tropical fish and plant life all put on a colourful display including lobster and seahorses, if you're lucky you may even get to see a dolphin, seal or a turtle. Reefs, grottoes, caves and ridges all wait to be explored, along with a World War II U boat and other interesting wrecks.
Visibility is variable from 3-15 metres, diving is available all year round and waters are clean and relatively free from pollution.