| ORGANISATION | LOCATION |
| Casa Ana | Granada, Spain |
| Casa Blanca Yoga and Reiki Therapy Centre | Andalucia, Spain |
| Casa Cuatro Chimeneas | Spain |
| Chrysalis Spiritual Development Centre & Retreat | Andalucia, Spain |
| Clare Island Retreat Centre | County Mayo, Ireland |
| Club Dance Holidays | Argentina, Cuba, Italy, Morocco, Portugal, Spain, Turkey, UAE, USA |
| A Colina Atlântica | Portugal |
| Community Action Treks | Nepal |
| Cornish Tipi Holidays | Cornwall, England |
| Cortijo Romero | Andalucia, Spain |
| Cortijo Vadillo | Andalucia, Spain |
| Costa Azul Retreats | Portugal |
| Creative Ithaki | Ionian Islands, Greece |