The Piedras Bolas continues northward 85 meters and then enters another water feature. This feature is a complex drain and aqueduct combination. (The interior of the aqueduct is pictured above.) The drain begins at structure 13 of the Xinil Pa' Group and flows east-to-west toward the Piedras Bolas. This drain is non-functional. The aqueduct's beginning is unknown but functional, flowing south to north. It is possible that the aqueduct actually flows beneath the drain creating a crisscross effect.