Set in a beautiful garden estate, this Victorian Gothic castle looks like it was designed for a Disney movie but it was in fact built for the Grogan-Morgan family between 1810 and 1855. The magnificent parklands—with towering trees and ornamental gardens—offer a grand frame to the castle. Unfortunately, you can't tour the building (it houses an agricultural college) other than its entrance hall, but the well-maintained grounds are open to the public. The centerpiece is the 5-acre lake, one side of which has a statue-lined terrace where you can take in the panorama of the mirrored castle. Because there's such a variety of trees—Japanese cedars, Atlantic blue cedars, golden Lawson cypresses—there's color through much of the year. Nearby are the Devil's Gate walled garden—a woodland garden set around the ruins of the medieval castle of Rathlannon—and the Irish Agricultural Museum. The latter, housed in the quadrangular stable yards, shows what life was once like in rural Ireland. It also contains a 5,000-square-foot exhibition on the potato and the Great Famine (1845–49).