Necessary elements for a perfect picnic: scrumptious food, fine wine, engaging company, cooperative weather, and a picturesque setting. You find the first four and we'll recommend the last one. This urban secret, which is nestled between tall condominiums, offers ample grass on which to drop that little-used, red-checkered tablecloth. Once you're seated in the glorious shade of the oak canopy, soak in the vista of Biscayne Bay's blue water, green mangroves, and the skyscrapers of Miami Beach. The city recently spent $100,000 to upgrade the park. There's a tot lot, three concrete chessboards, and six picnic tables with two nearby barbecues. Bring along a Frisbee; this place has ample room to toss a disk. After completing your hearty meal, lean back on the sheet, close your eyes, listen to the rhythm of the waves lapping against the shore, and succumb. If you are missing any of those important elements, dream about them.