Board Thread:Lore Discussion/@comment-96.252.245.207-20130116060134/@comment-24261859-20140119023010

Off the top of my head (check the wiki article for more)

There's the White-Gold Tower in the Imperial City. (Presumed deactivated, but may have been reactivated with the intervention of Akatosh's avatar)

Ada-Mantium, AKA the Adamantine Tower. Currently active.

Orichalc. Deactivated when the continent of Yokuda sank into the sea.

Green-Sap. The largest moving tree-city in Valenwood. Status unknown, although its current stillness may be a sign of deactivation.

Snow-Throat, AKA the Throat of the World. Status unknown.

Walk-Brass, AKA Numidum. Deactivated after either after its connection to the Heart of Lorkhan was broken or after the second version was destroyed by the Nerevarine. I forget which.

I think there are more, but these are the main ones.