The Well of Secrets and the Manticore's Throne

From the introduction: The Well of Secrets and the Manticore's Throne is a mini adventure designed for 2 - 4 characters of level 3 - 5. It is set in Forgotten Realms, but not in a specific place so that it can be used as a random locale, or perhaps just a lair as part of a random encounter, or an adventure between main adventures.