The Ruins Of New Atlantis

Found at the bottom of the mediterranean sea and subsequently explored briefly, by the Condiments. Guarded by a horrible cephalophod-like behemoth with chitinous exoskeleton and suspected abyss-fuelled powers. The "ruins" were found to be a set of stairs carved into the ocean floor in the location of an ancient meteorite impact, a descent which culminated in a chamber holding a treasure-trove of Siderite-items. In the center was found the accursed play by William Shakespear, capable of opening a portal to the Atlantean Hell, surrounded by various ominous statues forged from pure Siderite.

Image carved into the stone door leading to the inner chamber:

The Fiery security protecting the Fiendish Folio: