Nearly a mile up in the highlands of Guatemala, Atitlán (Lago de Atitlán) rests at the foot of three massive conical volcanoes. Small Mayan villages line its shores, which are set off by steep hills draped with oak and pine trees and nearly 800 plant species. There's no single, must-see view of the lake, so try several vantage points: from up high on Highway 1; from the town of Panajachel, the buzzing market hub that juts out into the water; or aboard a lancha, one of the many small boats that ferry visitors from village to village. We're saddened to note that the lake has built up high levels of blue-green algae over the years (in October and November 2009, a film of green scum began briefly marring its surface; since then there have been ambitious efforts to solve the problem).
Nearby: Panajachel is about 2.5 hours by car from Guatemala City.