Simply drive along the B82 and then follow the signs for Castle Archdale Country Park. If you have visited Devenish Island you might feel a bit peckish now - the café in the museum complex comes highly recommended. You might also want to stretch your legs here, the excellent walks through the woods are a treat.
Or you may choose to explore White Island, famed for its ecclesiastical ruins and enigmatic statues. A small ferry to White Island leaves from the Castle Archdale Marina.
Once you have finished your visit, get back onto the B82 and turn left, driving through Lisnarick. Make a brief stop at Old Castle Archdale (signposted). Then carry on towards Boa Island ...
