There is something pleasantly dreamlike and unreal about Black Point Marina. It's an improbable mix of natural and human construction. On some sea charts the area is known as "the featherbeds." Dog walkers have been known to meet crocodiles on Black Point's walkways. To the south looms the region's only peak, Mount Trashmore. At the marina's dockside restaurant and bar, the Pirate's Den, the beer runs cold, the food is passable, and customers can down pitchers while watching herons fish. A 1.5-mile jetty path that juts into the bay is the perfect place for a stroll afterward. Couples spread blankets on the grass. Families picnic and fish. Manmade Miami is rarely this peaceful.