It's pretty impressive to see the Chernobyl New Safe Confinement [0] construction beginning around 2010 and its final movement over reactor 4 being completed between 2016 and 2017.

Link: https://earthengine.google.com/timelapse#v=51.38202,30.09999...

[0] https://en.wikipedia.org/wiki/Chernobyl_New_Safe_Confinement