this forgotten temple lies underneath the basement of Ancient Artifacts and adjacent buildings. (It might be accessible via a cave-in from one of their basements)
It connects to:
The temple of Norok contains a “recharge station” that will overwrite the world-print of any gem with that of any magic item. This can be used to reliably set destinations for a spelljammer. BUT, a piece is missing! It can be found in Ancient Artifacts
Wandering the temple is a decent level monster from another plane