Donegal is a town at the mouth of the River Eske, in northwest Ireland. Originally built in the 15th century, Donegal Castle has later additions from the Jacobean period. The Four Masters Memorial obelisk honours 4 scribes from the nearby Franciscan friary, now in ruins. Donegal Railway Heritage Centre hosts rail memorabilia in an old station house. Donegal Bay is home to a seal colony, plus cormorants and cranes.