The largest Maya city ever built, swallowed by the jungle of Petén. The Great Pyramid of La Danta rises 72 meters — the most voluminous Maya pyramid in the world. To get there you hike five days from Carmelita through thick jungle, or fly in by helicopter: there's no easy shortcut. It's still under active excavation, in the heart of the Maya Biosphere Reserve. Archaeological adventure in its purest form.