Lazing on the beach with the sun warming your skin, a piña colada cooling your hand, and a good book holding your attention is all very well. But for some, this kind of beach life can get pretty ...

Photo by Caine Delacy/Stocksy. Design by Erik Mace for Yahoo Travel. Summer may be slipping away, but you still have time to slip beneath some waves. The best part is — you don’t even have to leave ...