The blue expanses of the Atlantic Ocean offer relatively few archipelagos to lure visitors. While the island supply may be limited, the natural attractions and cultural experiences awaiting on these oceanic oases can be exceptional. The lush landscapes, volcanic peaks, and Portuguese heritage of the Azores and Madeira invite visitors to slow down, take in the scenery on a bucolic walking path, and savor fresh-caught seafood and local vintages at a waterfront cafe.