Droichead Átha
County Louth

Founded by the Vikings, the city on the Boyne River has some remarkable monuments to visit, such as St. Laurence Gate from the 13th century, which looks more like a fortress than a city gate.

The Millmount Fort is located on a hill under which an ancient tomb is suspected. The Martello Tower on the summit was built in 1808 and was part of the surrounding barracks.