Martin Gray is a cultural anthropologist, writer and photographer specializing in the study and documentation of pilgrimage places around the world. During a 38 year period he has visited more than 1500 sacred sites in 165 countries. The World Pilgrimage Guide web site is the most comprehensive source of information on this subject.
Additional information and image galleries:
- Megaliths of Bada, Besoa and Napu valleys, Sulawesi Island
- Bada Valley, Sulawesi Photo Gallery
- Napu Valley, Sulawesi Photo Gallery