The Yawning Portal is a famous tavern located in the city of Waterdeep in the Forgotten Realms campaign setting of Dungeons & Dragons. It is known for its large, circular well that descends into the Undermountain, a vast dungeon filled with monsters and treasures. Adventurers often gather here to share stories, recruit companions, and prepare for their quests. The tavern is owned by the legendary adventurer Durnan, who has a rich history of exploring the depths of Undermountain. The atmosphere is lively, with patrons enjoying food, drink, and entertainment. The Yawning Portal serves as a hub for adventurers seeking fortune and glory in the dangerous realms below.