Tiree Ringing Stone 

This rock is actually a deposit from a glacier which covered Scotland during the last ice age, from the island of Rum to the north. The light grey granodiorite boulder is a much younger than anything found on Tiree which is ancient Lewisian rock. The Ringing Stone has been decorated by dozens of cup markings. These have religious significance dating back 4000 years but the precise purpose and meaning is unknown.

When hit with another stone, The Ringing Stone clangs like a large piece of iron. Legend has it that if the boulder ever be broken then Tiree will sink beneath the waves.