Down on the pretty Westport Quay in County Mayo—where the lively vibe of this lovely coastal town meets the amazing Clew Bay with its 365 islands—there's a real hidden gem for anyone wanting to know more about local history: The Clew Bay Heritage Centre. It's not some massive, stuffy museum; it's a smaller, more personal place, probably started by people who love the area. It's where the stories…

Tucked away in Ballyjamesduff, County Cavan, the Cavan County Museum is a great keeper of the area's rich and varied past. It's in a smart old convent building—that's full of history itself!—and the museum gives visitors a great trip through thousands of years of human life in this unique bit of #ireland. From mysterious old carvings to sad reminders of 20th-century wars, and showcasing local art…