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If you are looking for a secure place to store information, then inside a mountain seems a safe bet.
The Mountain Complex and Data Center offers three million square feet of space inside a mountain situated more than 100 feet above the top of the Table Rock Dam in the Ozark mountains of central US.
Inside the mountain there is a further 75 acres of undeveloped space, as seen here.
The facility's owners say the site is "nearly impervious" to catastrophes. Tornadoes blow over the site, floodwaters can't reach it and a "direct attack could not substantially harm The Mountain".
Photo: The Mountain Complex and Data Center
Beneath this Orthodox Christian cathedral in Helsinki is a datacenter designed to pipe heat to nearby homes. The datacenter is located in a former WWII bunker carved into the rock below Uspenski Cathedral.
Heat from the hundreds of computer servers in the datacenter is captured and transferred to water-filled pipes and then used to heat homes in the Finnish capital.
The amount of heat transferred should be enough to heat about 500 homes.
The energy usage of the datacenter, used by IT services firm Academica, is designed to be half that of a typical datacenter.