Dog parks can be stressful for humans. You want to let your dog explore freely, meet new friends, and romp around. But how do you know if the other dogs there have been trained properly? What if they have fleas or aggression issues? These are the neuroses of a dog owner with severe attachment anxiety. But there's a place in Miami that can help — for a lot less money than the therapist's couch you probably need. Just over the Rickenbacker Causeway, next to the graffiti-covered Miami Marine Stadium, sits Hobie Island Beach. Cubans call it "Los Espinitos" because the beach is filled with mangroves popping up along the sand. It's not an ideal beach for people, but for dogs, it's a natural playground of adventure. Some dogs are afraid of water, flailing their paws as they try to walk across the swampy expanse. Others are natural-born swimmers. With the wind in their fur, dogs paddle across the shallow shoreline, discovering a new world — much to their relaxed owners' delight.