Arecibo Observatory Collapse Drone Footage & Survey : Amazing Scale & Live Failure Capture I would go to the 3:10 mark (I tried to start it there for you) and view the massive size of the structure briefly before you begin watching this. Then go to the beginning. 

The scale is remarkably large and it will enhance how amazing this capure is. Enjoy !

https://youtu.be/b3AASKr_iHc?t=190