The Cape Verdean island of Sal is all about the beach, baby. White sand stretches along glassy turquoise waters—perfect for a lazy day of sunning or some heart-pumping watersports. Snorkelers and divers will find plenty of tropical fish, turtles, and dolphins to look at. On dry land, kids (and grownups!) will marvel at the Terra Boa mirage, an optical illusion that conjures a peaceful-looking lake in the middle of a large, flat plain.