Where is the 40 thieves lair in poptrapica?

In Poptropica, the lair of the 40 Thieves is located in the Arabian Nights Island. To find it, players must navigate through the marketplace and complete quests that lead them to the hidden entrance of the thieves' hideout. Inside, players will encounter various challenges and puzzles related to the story of Ali Baba and the 40 Thieves.