During their third adventure with Atrus, The Stranger is invited to Tomahna, Atrus and Catherine’s post-Myst home. Situated not far from The Cleft, Tomahna is something of an oasis.
While The Stranger would eventually be able to visit Tomahna in its entirety, during this trip they were only able to see a small portion of it before their visit was interrupted by Saavedro and the quest to reclaim the Releeshan Linking Book.
For those who might not be aware, Mysterium is an annual gathering of Explorers and DRC members. Starting in 2000, it takes place in Spokane, Washington, home of Cyan Worlds, Inc. 2019 marked the 20th anniversary of the event.