These tours, led by a geology expert, focus on the natural environment. One popular tour ascends before dawn to the Rostro Maya (Indian Nose; Q200 per person), from which you may observe eight volcanoes, and learn how they came to stand in a line and how Lake Atitlán was formed.

Overnight trips to Santiaguito, Fuego and Pacaya (all active volcanoes) are offered, for around Q700 per person.