Explore and learn more about the ages and places of Myst 4: Revelation:
Tomahna is the new home of Atrus, Catherine and their daughter Yeesha. It is located within a few miles of the Cleft, but in a geographically distinct area. Tomahna houses the new library of Atrus, and is the third home of Atrus and Catherine, after Myst Island and Chroma'Agana.
A view of Tomahna at night is seen later in the game.
Haven is a quite lush and jungle-like Age. It is the prison age for Achenar. What appear to be dinosaur-like creatures also inhabit this jungle world. An unbreakable Nara booth was added at the entrance of the age so Atrus and his family could visit the age, but Achenar could not exit.
In Achenar's stay, he was confronted with surviving along side of the notorious wildlife, who often stole his food and attacked him. He constructed a large house in the center of the lagoon in the jungle as well as several observation posts.
This was the age originally viewable through the Blue Book in the library of Myst.
Spire is the prison age for Sirrus. It is an enormous spire of rock and crystal surrounded by clouds, with some interesting natural weathering occurring. The clouds occur in layers. This was the first of the prison ages to be written, as well as edited with a nara linking chamber atop the highest peak.
The true geography of Spire is very surprising; the mountains actually float in mid-air due to an electromagnetic property of one of Spire's main minerals. Spire doesn't actually have stable ground; if you go below the second cloud layer, a strange green energy source can be seen.
Sirrus has constructed several inventions in Spire, amongst them his Rock-Ship, a floating vehicle which moves with the aid of several electricity conductors and many of the antigravity minerals in Spire. Others include his Spider Chair and Grand Instrument, a large, guitar-like device with vibrations caused by electromagnetic waves, and the Bomb Factory, a machine used to construct "bombs" that send out electromagnetic waves with enough intensity to destroy certain materials.
This was the age originally viewable through the Red Book in the library of Myst.
Serenia is an Age of ancient-looking stone structures. Its population uses a large flower on the island to capture memories and preserve them after the person is dead. Atrus believes that the flower is a fungus that absorbs the "dead" memories and transfers them to storage globes that grow underwater. The people of Serenia rely on Spirit Guides to aid them in visiting their Dream World, where one can see memories and spirits.
The age was heavily involved in Sirrus and Achenar's original plots when they were imprisoning their family. More recently, Yeesha has taken a liking to the age, and received a special amulet which can sense the memories most prominent to her location. The stranger uses this in the game often.
The people of Serenia rely on Spirit Guides to aid them in visiting their Dream World, where one can see memories and spirits.
Additional fact-checking by Tweek