I am starting a thread in subforum Pilgrimage under Temples under Customs and Traditions. I request all devotees to benefit and also post more information on these shrines. Athishtanams are places where a Shivalinga is placed over the interred Mahan. Brindavans have a Thulasi maadam installed instead of Shivalinga. There is no Siva-Vishnu Bhedham in this. I start with Vadavambalam, the Adhishtanam of Sri Athma Bodhendra Saraswathi Maha Swamiogal at Vadavambalam near Panrutti, Tamil Nadu. Please pray to these Great Mahans and receive their infinite Grace!