Blarney Castle, 8 km (5 mi) northwest of Cork City, is southern Ireland's most famous landmark. The 15th-century tower house (built by Cormac MacCarthy, Lord of Muskerry) draws 400,000+ visitors annually—most for one ritual.
Set in the battlements, the Stone of Eloquence requires leaning backward over a parapet (assisted by staff) to kiss it. Legend: gift of persuasive speech. Origins: Crusader relic, Jacob's pillow, prophet's stone—myths abound. Geologically: local Carboniferous limestone.
Cork City itself—English Market, St. Fin Barre's Cathedral, Crawford Gallery—makes a full day. Blarney is the hook; the region is the reward.