Ross Castle is a 15th-century tower house located on the edge of Lough Leane in Killarney National Park, Ireland. It was built by the O'Donoghue clan and is known for its picturesque setting and historical significance. The castle features a round tower and a defensive wall, showcasing typical medieval architecture. Visitors can explore the castle and its grounds, which offer stunning views of the surrounding landscape. Ross Castle is also a popular starting point for boat trips on Lough Leane, allowing tourists to experience the natural beauty of the area and learn more about its rich history.