Climate Lab

The upper observatory tower has been extensively modified. —Original structure reinforced with corrosion-resistant high-temperature alloys —Low-voltage, long-duration internal power supply added: probably radiological —Sensors and digital computers installed These changes probably occurred more than a thousand years after the observatory's original construction. Assessment: the observatory was repurposed as an anchor for a long-term monitoring station. The builders expected the station to be abandoned, so left it completely automated. Recommend entry and data retrieval.