Fifteen years ago, Punta Negra Beach in Puerto Vallarta was a hidden gem known only to a few intrepid explorers. Back then, weekends saw just a handful of people scattered along its pristine shoreline. There was no formal entrance; to reach the beach, one had to navigate through dense woods and carefully climb down a rocky incline. The absence of vendors added to the beach's untouched charm, making it a tranquil haven for those who sought solitud…