So okay, residents of other cities can criticize Miami for its lack of cosmopolitan cultural events, poor public transportation, and corrupt politicos. But when it comes to natural resources, other urban centers don't even come close. One shining example is Matheson Hammock Park's atoll pool, an eco-friendly swimming hole that puts chlorinated concrete boxes to shame. The atoll pool is actually a saltwater pond flushed by the tidal movement of adjacent Biscayne Bay. Surrounded by a pristine, palm-shaded beach, and blessed with a breathtaking bay view, it's a great place for just about everybody. Mothers like to bring their young children here because of its calm waters, which also make the pool perfect for lap-swimming. And it's cheap, only $3.50 per carload to enter the park. On weekends visitors can eat at the coral rock Red Fish restaurant or grab a hot dog from the snack-bar window, then settle in for some sunbathing. Take a dip in this pool on a hot day, lay back in the sand, and you'll definitely be glad you live in Miami.