My grandfather James Carroll who lives in Spa Boyle told me the following story about the Druids altar. There is a Druids altar in Tinnecara to the north side of the railway in Thomas Ballintinels land. The altar is made of three large stones two uprights and one over head. Each stone weighs about ten tons weight. The druids used to come home from Knockadoo and swim across Lough Gara to worship their god at this altar.
Recorded as part of the Schools Collection in the 1930s, and online now at Duchas.ie.