Ireland is home to numerous castles, many of which date back to the medieval period. These structures were built for defense and as residences for the nobility. Notable examples include Blarney Castle, famous for its Blarney Stone, and Dublin Castle, which has played a significant role in Irish history. Today, many of these castles are popular tourist attractions, offering insights into Ireland's rich heritage. Some, like Kilkenny Castle, have been restored and are open to the public, while others, such as Ashford Castle, operate as luxury hotels, blending history with modern hospitality.