| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Casale | cnl00008042 | Italy | 7.63972222222222 | 45.1797222222222 | |
| Casale Monferrato | cnl00008034 | Italy | 8.44944444444445 | 45.13 | |
| Casatico | cnl00021520 | Italy | 10.533333 | 45.116667 | |
| Casciana Alta | cnl00046046 | Italy | — | — | |
| Cassis | cnl00017870 | France | 5.53305555555556 | 43.2166666666667 | |
| Castano | cnl00017288 | Italy | — | — | |
| Castel Guelfo | cnl00023527 | Italy | 11.683333 | 44.433333 | |
| Castel Sant' Angelo | cnl00001890 | Italy | 12.4663888888889 | 41.9030555555556 | |
| Castelfidardo | cnl00024173 | Italy | — | — | |
| Castelfranco di Sotto | cnl00023386 | Italy | 10.75 | 43.7 | |
| Castellarano | cnl00017569 | Italy | 10.783333 | 44.566667 | |
| Castelnuovo Scriva | cnl00025431 | Italy | — | — | |
| Castelo Branco | cnl00042408 | Portugal | -7.49083333333333 | 39.8219444444444 | |
| Castelsarrasin | cnl00003595 | France | 1.1 | 44.0330555555556 | |
| Castilla | cnl00027884 | Spain | — | — | |
| Castilleja de la Cuesta | cnl00019656 | Spain | — | — | |
| Castle Hedingham | cnl00020975 | England | — | — | |
| Castle Howard (co. Wicklow) | — | Ireland | — | — | |
| Castres (Tarn) | cnl00008100 | France | 2.25 | 43.6 | |
| Castro | cnl00022232 | Italy | — | — | |
| Catalunya | cnl00023726 | Spain | — | — | |
| Caudebec | cnl00019419 | — | — | — | |
| Causses-et-Veyran | — | France | — | — | |
| Cavalese | cnl00022455 | Italy | — | — | |
| Cavan | — | Ireland | -7.3601 | 53.991 |