Here are a few links:

India - Tiruvannamalai - Niketan Ashram, India

India - Tiruvannamalai- Mountain Saran Tours - local agent

India - Tiruvannamalai - Pilgrimage into Sacred India (Dutch and English speaking)

Denmark - Cph - The Open Space

Denmark - Seminars and Sacred Tour of Tamil Nadu

Denmark Møen Retreat Centre

Belgium - Viviane - Yoga Iyengar