The Yawning Portal is an inn and tavern in the city of Waterdeep, renowned as the primary open route into Undermountain. A well within its walls leads down into the first level of the vast dungeon complex.
It is owned and run by the famous adventurer Durnan the Wanderer. The name “Yawning Portal” refers to the deep well and also alludes to the habit of its patrons to tell wild stories.
Naturally, the inn is a popular attraction among visitors to Waterdeep and a common point of departure as well as a refuge for expeditions into the extensive dungeons.