D'Esterre Bridge, built in 1784, crossing the Ratty/O'gChearnaigh River between Bunratty and Sixmilebridge, is characterised by the imposing ruins of the gate-towers remaining from its days as a toll-crossing. Henry D'Esterre built this bridge at his own expense as he wanted a crossing close to his own estate. The famous duel in February 1815 between Daniel O'Connell and Henry D'Esterre's son, John Norcot, arose in local tradition because O'Connell refused to pay the toll, although this conflicts with the conventional account of the duel.