The Age of D'ni was the Age Written by Ri'neref, Master of the Art, to house the group of Ronay refugees from Garternay. Though they didn't know it until shortly before the downfall, the Age of D'ni is also the planet Earth. This article concerns those parts of the Age outside D'ni Proper — that is, locations on Earth's surface — which play important roles in D'ni's history.

The Cleft

The Cleft in southern New Mexico

Also known as D'ni - Riltagamin (literally meaning "D'ni - Unknown," the identifier for all areas of this Age that the D'ni were unaware of), the Cleft is a fissure of volcanic origin near an extinguished volcano. It is near the old exit of the Great Shaft created by the D'ni a number of decades before their downfall, and as such offers a way in to the City other than by Linking.

After the downfall, Anna took her son Gehn with her to the Cleft, and established a living here, surviving from the careful capture of water and occasional trading with passing caravans. After Gehn's departure Anna lived here with her grandson Atrus, until he was taken away by his father to D'ni.

Atrus later established a home nearby, and there is a possibility he returned to live there at one point.

The novel Myst: The Book of Ti'ana implied the Cleft was somewhere in the Middle-east, near an evidently Arabic or Ottoman city called Tadjinar, but it has been revealed that it is actually in the desert near Eddy County, New Mexico, United States, on the property of one Jeff Zandi. Its location suggests that the cavern system that supports the D'ni empire is somehow connected to the Carlsbad Caverns.

The Lodge

The Lodge was the home of Anna and her father, during their days as surveyors of the area near the Cleft.

Tomahna

View from Atrus' house on Tomahna to outside desert

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.

Tomahna is seen in the games Myst III: Exile and Myst IV: Revelation where it seems that the building has been expanded around the area.