What a fantastic way to spend time with your family and friends in a private boat on the lakes of killarney cruise to innisfallen island innisfallen island can be seen in the distance from ross castle out beyond the entrance to the bay a monastery was founded on innisfallen in the 7th century and it became a seat of learning and it is said that king brian boru studied there on the island are the remains of the extensive 12th century augustinian priory and a small 11th 12th century romanesq