Happy April First, or as I like to call it, the day when the internet become useless for 24 hours as every amateur comedian and corporation tries to be funny. Rest assured, you’ll find no such japery here, at least not this year. Instead, we continue our fascination with unique libraries, whether those housed in a nuclear bunker, or hosting a collection of rare colors. Today, a look at an archive in a salt mine under the British countryside. It’s an active mine, and as the mine continues to grow, new storage space is created. The conditions offer ideal temperatures and very low humidity, great for long term storage of archival materials. Below, a tour of the mine and the treasures it stores.