1. Dokkum; Chapel St. Bonifatius
2. Assen Megalithic site (dolmens – hunebedden)
3. Emmen; Megalithic site
4. Heiloo; Mary's chapel and holy well
5. Haarlem; Mary's chapel
6. Laren; Church St. Johannes
7. Schiedam; St Liduina chapel
8. 's Hertogenbosch; Mary's chapel in Cathedral
9. Smakt; St. Joseph's chapel
10. Roermond; Church, holy well
11. Maastricht; Mary's chapel
Martin Gray is a cultural anthropologist, writer and photographer specializing in the study of pilgrimage traditions and sacred sites around the world. During a 40 year period he has visited more than 2000 pilgrimage places in 165 countries. The World Pilgrimage Guide at sacredsites.com is the most comprehensive source of information on this subject.