The natural wonders of the West coast can be enjoyed from one of O'Brien Line's ferries. Departing from Doolin Pier, cruisers can choose to admire the Cliffs of Moher from the inside of a heated cabin with large viewing windows, or surrounded by fresh sea air on the outdoor deck. The geological glory of the cliffs is showcased as the vessel sails past the Sea Stack, which offers the chance to see puffins, razorbills and other nesting birds during the one-hour expedition. Those furthering their journey to cover Inisheer can take in the imposing rock formations and beaches of the smallest of the Aran Islands, and catch sight of O'Brien's Castle and other medieval ruins.