The City that Waits is a chapter of the module Return to the Tomb of Horrors, a 2e adventure that has a lot of exciting and challenging elements to it. You can find the adventure for 2e on DriveThruRPG. I have gone through this part of the adventure and converted it to fifth edition of the world’s oldest and most popular roleplaying game. In addition to room, spell, and monster conversions, I have added more supplemental encounters that you can use to extend your stay in this dangerous decrepit city.
Additionally, I have included 15 unique maps to this bundle for your enjoyment. There is a map for every tower and encounter your players will face. These maps include the rooms for the supplemental encounters I have added to the conversion document.
- from the publisher's blurb