| Gretna to Castelletto sopra Ticino | 5,154.23 mi (8,294.93 km) |
| Gretna to Castelli Calepio | 5,211.05 mi (8,386.38 km) |
| Gretna to Castelnovo ne' Monti | 5,271.95 mi (8,484.38 km) |
| Gretna to Castelnuovo Berardenga | 5,356.50 mi (8,620.45 km) |
| Gretna to Castelnuovo di Porto | 5,442.18 mi (8,758.34 km) |
| Gretna to Castelnuovo di Verona | 5,254.53 mi (8,456.34 km) |
| Gretna to Castelnuovo Rangone | 5,291.09 mi (8,515.19 km) |
| Gretna to Castelvetrano | 5,613.06 mi (9,033.35 km) |
| Gretna to Castelvetro di Modena | 5,293.48 mi (8,519.04 km) |
| Gretna to Castenaso | 5,315.56 mi (8,554.57 km) |
| Gretna to Castenedolo | 5,233.29 mi (8,422.16 km) |
| Gretna to Castiglion Fiorentino | 5,374.71 mi (8,649.76 km) |
| Gretna to Castiglione del Lago | 5,387.40 mi (8,670.19 km) |
| Gretna to Castiglione delle Stiviere | 5,244.27 mi (8,439.84 km) |
| Gretna to Castrolibero | 5,709.21 mi (9,188.09 km) |
