Robert Taylor, Dean of Clonfert, built this castle (it's really more of a country house with fancy embellishments) in 1738. It stands in 194 acres (79 hectares) of rolling pasture, woodland and gardens. There are regular tours of the castle; of particular interest is the library, with its marvellous Agatha Christie-style secret door hidden behind fake bookshelves (the clue to opening it is written on the spine of one of the fake books). Two coffee shops serve good cakes. But outdoors is the thing here: picnics, hide-and-seek, nature trails or romantic walks. Ardgillen is rarely too crowded; and when you've seen all you want to, a footbridge links the grounds to Barnageera beach.