Easter Island (Rapa Nui) - Chilean island in the South Pacific famous for its Moai statues. Despite the moderate climate there are some good tropical beaches here. Shore and seabed: rocks, sand. 
Fly to Mataveri International Airport (IPC). Keep in mind that the number of flights to Easter Island is limited and they are very expensive. In most cases, best is to visit this region while you travel round the world.