Floating nuclear power plant. This is the Russian power barge Akademik Lomonosov.
Fullsize image: https://s3-us-west-1.amazonaws.com/h..._fullsize1.jpg
https://s3-us-west-1.amazonaws.com/h...wer_plant2.jpg
Fullsize image: https://s3-us-west-1.amazonaws.com/h..._fullsize2.jpg
https://s3-us-west-1.amazonaws.com/h...wer_plant1.jpg
More: https://en.wikipedia.org/wiki/Akademik_Lomonosov
Previously:
https://www.homemadetools.net/forum/...371#post104108
https://www.homemadetools.net/forum/...2374#post96156
https://www.homemadetools.net/forum/...978#post137684