Aldous Huxley famously called Guatemala's Lake Atitlan "the most beautiful lake in the world." So if Atitlan—a 130-square-kilometer, blue-green beauty surrounded by three towering volcanoes—is the most beautiful lake in the world, then Casa Palopó, the nine-room hotel nestled in the serene hills above the lake, is the most beautiful hotel on the most beautiful lake in the world....