Most people have never heard of Lake Atitlan, a mystical body of water in the highlands of Guatemala that’s fringed by a trio of volcanoes and home to a number of local Mayan villages, but once they visit, they can’t stop talking about it. The lake seduces visitors with its combo of intense volcanic lineage (it’s a caldera that filled with water more than 84,000 years ago) and serene ambience. The best way to see it all is to hire a guide and hike the 5-hour, round-trip trail to the top of San Pedro Volcano.