 Trading and pilgrimage routes ("calzadas") were built across the plains and through the hills of the Altiplano.The most important and still remaining archaeological site of the Muisca, dates to the pre-Muisca Herrera Period; called by the Spanish conquerors "El Infiernito".It is an astronomical site where at solstices the Sun lines up the shadows of the stone pillars exactly with the sacred Lake Iguaque, where according to the Muisca religion the mother goddess Bachué was born.