1994  González-Arreola et al., p.214: At Olinalá towards
Cualac; at km 2.4 is Los Arcos, the remains of an old aqueduct.
From there, one should continue on foot along a stream and a
limestone outcrop. Unit 5 is approx. 600 m downstream. Units 1-7
crop out in the stream that crosses the road between Olinalá and
Mexteopan.