The Observatory is located some 90 metres southeast of the Chichanchob, creating, in effect, a large plaza. It consists in a large, rectangular platform in a single section with a discreet slope, rounded corners, and cornices that border an upper plain frieze. It measures 67 metres from north to the south and 52 metres from east to west. There is a broad staircase (you may not climb) delimited by beams decorated with intertwined serpents. Front, and centre in this photograph, is a smaller platform of similar design from which the roof, probably flat, and frieze are missing. This would have been used for ceremonial purposes.
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