Clonmacnoise Cruise “A place where time stands still” Departing from Athlone Castle, the cruise travels downstream on the River Shannon to the famous 6th Century monastery of Clonmacnoise. During this meandering voyage there is live commentary on local history, monastic life, and the surrounding flora & fauna. This cruise is for culture seekers, history buffs and outdoor enthusiasts. “BOOK NOW – Groups & Events: Viking Tours caters for a range of groups and special events. These include school tours, wedding parties, tour groups and corporate days out.