Fodor's Expert Review Round Tower

The nearly 100-foot-high Round Tower, adjacent to St. Colmcille's House, dates back to 1076 and is in almost perfect condition. The tower was likely used as a defensive hideout by local monks during an invasion; they would climb up the rope ladder with their valuables and pull it up after them. Its top story has five windows, not the usual four, each facing an ancient entrance into the medieval town. You can't go inside, but just standing beside it gives a real sense of the inventiveness and desperation of the Viking-fearing monks.