The Céide Fields in Mayo are a fascinating Neolithic site overlooking the Atlantic Ocean, dating back a whopping 6,000 years. Discovered by a local schoolteacher in the 1930s, this ancient field system is the oldest of its kind in the world. Visitors can explore the site, learn about its history at the modern Visitor Centre, and soak up stunning views from the panoramic viewing platform. It's definitely worth a visit if you're into uncovering Ireland's ancient past!