The Curragh is a flat open plain of almost 2,000 hectares of common land in County Kildare, Ireland, between Newbridge and Kildare. This area is well known for Irish horse breeding and training. The Irish National Stud is located on the edge of Kildare town, beside the famous Japanese Gardens. Also located here is Pollardstown Fen, the largest fen in Ireland. This area is of particular interest to botanists and ecologists because of the numerous bird species that nest and visit there. There are also many rare plants that grow there.
It is composed of a sandy soil formed after an esker deposited a sand load and as a result it has excellent drainage characteristics. This makes it a popular location for training racehorses.