On the top of Dunfillan near Comrie was a rocky seat where, according to tradition, Fillan sat and gave his blessing to the country 'round.
A stone basin at the bottom the hill, was known as "Fillan's Spring", whose water was said to cure sore eyes.
[1] According to historian and antiquary William Forbes Skene, the village of St Fillans, on the eastern end of Loch Earn, takes its name from him.
The cave has flat rocks that are presumed to have been used as beds and a small spring of "holy water" at its rear and a well.
It served as a prison during the witch hunts of the 17-18th centuries and was used as a rubbish tip which probably resulted in its disappearance for some time.