The Vast Interior is a location in Torment: Tides of Numenera.
Points of interest
Welcome to the tummy... Or whichever part of the Bloom you're in. Head north to meet Grisseler and learn that the Dracogen job won't be as simple as you think. You can talk to the merchants to receive news that the Bloom is mighty ornery today.
Cross to the other side and meet Sundermun the Elder and Sundermun the Younger. You can interact with the pustule nearby. After completing three memories (you need to become the victim and suffer in each one; still worth 6 XP to weather all that), you will release an abykos and find the Mesmeric Handle among the debris.