Underwater data centers?
In the spring of 2018, team members from Project Natick deployed a massive tube filled with nitrogen in 117 feet of water off Scotland’s Orkney Islands. Inside were racks of running computer servers that team members monitored for the next two years. They wanted to see if a controlled environment, free of corrosive oxygen and humidity, as well as bumps and shakes from human interaction, increased server reliability.
For more, check out this MSN/C|Net story.