Cueva de La Lola ("Lola's Cave") is situated below Group A, near the bank of the Pancaco River as it flows to the northwest of the ruins. The cave is deep and wide; for most of its length it is high. The cave had been artificially widened and heightened. During the rain season rainwater filtering through the ground below the city flows out as a small waterfall at the bottom of the cave. The cave was used for ceremonial activities, related to the presence of the spring within it and the fact that the walls are formed from green phyllite; greenstone was sacred to the Maya and was associated with water and fertility. Ritual activities in the cave have continued into modern times, with ceremonial fires being lit within.