Beyond the site's boundary wall, about 500m east through the modern graveyard, is the secluded Nun's Church. From here the main site, including the towers, is not visible. The church has wonderful Romanesque arches with minute carvings; one has been interpreted as Ireland's earliest sheila-na-gig, in an acrobatic pose with feet tucked behind the ears.

To the west of the site, on the ridge near the car park, is a motte with the oddly shaped ruins of a 13th-century castle, built by John de Grey, bishop of Norwich, to watch over the Shannon.