Honeymooners can travel to any of the hundreds of tropical isles some call paradise. As befits heaven-on-earth, there is much to enjoy, see and do. Beaches, boats, banks and bikinis are Caribbean menu essentials. But the No 1 playground for the Americas also comprises movie-set beauty, coconut-tree-clad mountains, verdant valleys of sugar cane and bananas, and seashore galore. Caribbean cities glow with glorious architecture in communities established long before the automobile.