I was looking for archaeological lidar images and found a short video of a lidar survey of Angkor Wat:
https://youtu.be/o6Kq4XF1zKU
From:
https://www.nytimes.com/2016/09/20/science/angkor-wat-cambodia-archeaology.html
This led on to this:
https://youtu.be/KsDGDzwuQ-I
I am somewhat astounded.