This is the Thracian city that the party set out from initially.
http://encyclopedia.thefreedictionary.com/_/viewer.aspx?path=d%2Fd7%2F&name=Aegeansea.jpg
The palace of Thetis, mother of Achilles (King of Phthia) is said to lay somewhere between Imbros and Samothrace.
http://encyclopedia.thefreedictionary.com/limnos
The island is sacred to Hephaestus, and is where he keeps his forge. There is a volcano there, and it is where the Thracian king ordered Itrix to build a grand labyrinth.
Cybele, an aspect of Demeter, is said to travel to this island sometimes, as well as to the mainland north and east of the island.
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