We all want to discover the past of the spiral and the Pirate101 sides of some worlds so why don't you do a time traveller's bundle.
This consists of
Dungeon : The telegraph box(a housing item). A dungeon from where you need to find items from other worlds that belong to other world. The prefessor gives you this quest. The portal teleports you to the past of the Antheum + The Basilica (Milos is trying to find the knoledge crystal which is in Marleybone, Barkely square where an architect is trying t find his model of the marleybone bridge (which is in Celestia), Not sunken Celestia the place where there is the knoledge crystal and finally Krystallis where the mice still ruled (the model is found there and they lost something whatever.