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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