Top 10 roads tunnels in Thessaloniki - Ioannina: 10.Tunnel S1 : 812 m 9.Koiloma Tunnel : 1080 m 8.Krimnos Tunnel : 1100 m 7.Syrtos Tunnel : 1600 m 6.Anilio Tunnel : 2200 m 5.Tunnel S10 : 2244 m 4.Demati (Arahthos) Tunnel : 2633 m 3.Panagia Tunnel : 2700 m 2.Metsovo Tunnel : 3589 m 1.Driskos Tunnel : 4563 m