If you have already seen the Cliffs of Moher from land, you may want to book a boat tour and get a different perspective on this spectacular Irish landmark. The Doolin Ferry Company and Cliffs of Moher Cruises, both of which are located in Doolin, offer sailings starting in March until late fall. You’ll see the cliffs from below, the Horcrux cave featured in "Harry Potter and the Half-Blood Prince," colonies of nesting birds, and impressive sea stacks.