Altavista Archaeological ruin site in Zacatecas State is significant because of its placement on the Tropic of Cancer. The site has a Teotihuacan influence as evidenced by circle-cross inscriptions in rocks in the distant hills.
The glyphs found by archaeologists in the distant mountains mark sight lines of the rising of the sun on ceartain days. The glyphs are similar to glyphs used by the builders of Teotihuacan when they designed that city
Alta Vista ruin site has been examined by Archeoastronomer Anthony F. Aveni and found to contain solar significance and a deliberate placement on the Tropic of Cancer by builders of the Teotihuacan culture. A solar equinox alignment and a summer solstice alignment of the sun over a distant mountain at dawn and two Teotihuacan style, circle-cross petroglyphs led to the conclusion that Alta Vista was a Teotihuacan ceremonial outpost at the northern limit of Mesoamerica.
Alta Vista ruin site's position on the Tropic of Cancer would allow the observation of the one Zenith day each year for this point on earth.
South of the tropic of Cancer, Mesoamerican cities could have observed two Zenith days annually
The zenith day at Alta Vista falls on June 21-22 and marks the summer Solstice, the sun's most northerly movement over the earth.
Reach Alta Vista/Chalchihuites
Reach Altavist from the town of Chalchihuites. Estrella Blanca Bus reaches Sombrerete and then local bus reaches Chalchihuites. Taxi to the site