3100 N Ocean Drive, 606 Riviera Beach, FL 33404

Though technically a peninsula, Singer Island is due north — and across the inlet from — the island of Palm Beach. In the 1920s, its windswept beaches caught the eye of sewing machine heir Paris Singer, who, along with architect Addison Mizner, chose it for a never-finished resort called the Blue Heron. The name lives on today through Blue Heron Boulevard, the main thoroughfare onto the island from mainland Riviera Beach. Because Singer Island developed later than surrounding communities, it built taller. Amenity-laden condominium towers flank its oceanfront, including the Ritz-Carlton Residences Palm Beach and the Saarinen-esque Tiara — the tallest building in Palm Beach County. Between that skyline, you'll find a few older, low-rise neighborhoods, along with a smattering of beachy bars and restaurants. Most commerce is concentrated on the south end of the island, including the popular Sailfish Marina and the shopping village by the public beach entrance.