Killarney National Park is a wonder so riveting, you'll wish you had longer to explore. Lying just over 10 minutes south of Killarney, this idyllic spot spans a whopping 10,236 hectares, and features ancient oak woodlands and the entrancing Killarney Lakes (Lough Leane, Upper Lake, and Muckross Lake) set against a backdrop of breathtaking mountains. The park is found just under 16 kilometers from Ross Castle, although the castle and its environs all form part of this national heritage site.