 Line 3 (Athens Metro)

Line 3 of the Athens Metro runs from to , via Syntagma, although most of the trains reverse at .The section from Agia Marina to the tunnel portal east of Doukissis Plakentias is underground, and the section from Doukissis Plakentias to Airport is shared with Proastiakos Athens suburban trains, implementing a form of the Karlsruhe model.