Although the vast majority of the Crucible mega-factory has been lost to us after a misguided string of experiments involving the planetary core, parts of the planet-spanning factory can still be found in-tact and only partially submerged. Although we would strongly advise against visiting any Crucible site, the facilities are in mostly working order, and securing any of the Crucible's surviving cores should be considered a category 4 priority (priority categories can be examined in detail on pages 88-115 of the standard manual).

Do not under any circumstances attempt to 'dive in'.