Growing up playing in the frigid ponds of Wisconsin, Rex Boggs became used to sharing a pool with fish, frogs and egrets. For him, it was the way swimming ought to be. So when he and his wife Katy ...

From Sardinia to Sicily, Italy is home to a wealth of natural pools sculpted by the sea, where crystal-clear waters promise spectacular swims. Between volcanic cliffs, hidden coves and translucent ...