The world-famous Arecibo Observatory in Puerto Rico, known for helping scientists peer into deep space and listen for distant radio waves, is set to be decommissioned and demolished after engineers concluded that the facility’s structure is at risk of a collapse. While teams will try to salvage some parts of the observatory, the decommission will bring an end to the popular 57-year-old telescope, which has been featured in numerous films and television shows.

The decision comes after two major cables failed at the facility within the last few months, causing significant damage to the observatory. The National Science Foundation (NSF), which oversees Arecibo, assessed the impact of the cable breaks and found that the facility’s other cables could also fail soon. If some of the remaining cables break, engineers fear that the 900-ton suspended platform above the facility could come crashing down on Arecibo’s iconic 1,000-foot-wide dish. It’s also possible that three surrounding towers, which stand at more than 300 feet tall, could topple over in any direction, potentially hitting the visitor’s center or other important nearby buildings.

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With this imminent threat in mind, NSF determined that Arecibo cannot be repaired safely without risking human life. The agency’s engineers have evacuated the facility and set up a safety exclusion zone around the spaces where people could be in danger if there was a collapse. Meanwhile, engineers are now working on a plan for how to take the facility apart safely, which could involve the use of helicopters and maybe even explosive demolitions. “This decision is not an easy one for NSF to make, but safety of people is our number one priority,” Sean Jones, the assistant director for the mathematical and physical sciences directorate at NSF, said during a call with reporters.

Read more: The Verge