Caye Caulker, a little island off the coast of Belize, is one of my favorite places on Earth. I was lucky enough to spend a week there back in 2006. Tina's Hostel is my recommendation. So beautiful. Go fishing. Swim. Drink the neon-bright cocktails near “the split” (in the island). And jam out to some reggae. Here's a link to my unfinished Belize travelogue I posted about that time.