O'Brien's Castle: A Towering History

Perched on the highest point of Inisheer, O'Brien's Castle was built in the 14th century atop the remains of a 1st-century ring fort known as Dún Formna.

This historical site exhibits a unique combination of medieval architecture and stunning natural landscapes, with sweeping views over the island's clover fields, beach, and harbor. Sunset views are particularly breathtaking, offering a captivating sight for visitors.

Notable Features

• 🏰 Ancient Ruins
• 🌅 Spectacular Sunsets
• 🏞️ Scenic Views

Visitors can freely roam the castle's ruins, making it an appealing destination for tourists, families, and history enthusiasts alike. Accessibility is straightforward, given its open grounds, allowing everyone to enjoy the rich historical context and picturesque views.