Monaghan County Museum

More than 70,000 artefacts from the Stone Age to modern times are housed at this excellent regional museum. Its crowning glory is the 14th-century Cross of Clogher, an oak altar cross encased in decorative bronze panels. Other impressive finds include the Lisdrumturk and Altartate Cauldrons, medieval crannóg artefacts, and some frightening knuckledusters and cudgels relating to the border with the North.