DnD Head Canons

[Bohandas]

There's also the City of Union, and the Githyanki capital, and the ekolid city of Zionyn in the Abyss, and the demesnes of the greater deities,

EDIT:
And also the Great Dismal Delve, the City of Glass, the Heavenly City of Yetsira, the Formian Central Hive-City, The goblin fortress cube Clangor, Dis, Grenpoli, Jangling Hiter, the Crawling City, etc.