Completed Prelude
Completed The Vestibule
Completed The Oasis
Completed The Archipelago
Completed The Viaduct
Completed The Docks
Completed The Towers
Completed Mén-An-Tol
Completed Aphelion
Completed The Botanical Gardens
Completed The Lyceum
Completed The Sunken City
Completed The Orchard
Completed Mirador
Looks like you found an Easter Egg...