Blackrock Castle

Historic Building in Cork City

Blackrock Castle is a restored 16th-century castle that now, rather incongruously, hosts a science centre, planetarium and observatory. Kids love it and the pastoral location is worth the jaunt. It's on the south bank of the River Lee, 5.5km east of the city centre; take bus 202 from Parnell Pl to Blackrock Pier, from where it's a five-minute walk.