Bruff grove is home to An Binn Liosin, a fine Ring Fort about 70 metres in diameter. This is thought to date from around 500 AD. This fort was situated at a fording point in the river where the shallow water made it easier to cross.
This romantic and historic place was associated with the 18th century local poet Brian O'Flaharta. While walking by the banks of the river, the beautiful fairy maiden came out of the Binnlisin and spoke to him. He was struck by her beauty and inspired by her soothing speech and with the lovely surroundings. It was here he composed the lovely poem Binn Lisheen.