The Story of Saint Brendan (Journey into the Unknown) Irish Myths & Legends
 
Sometime in the early 6th century, Brendan set off with his crew on a seven-year voyage to find the legendary Island of the Blessed. Strange creatures attacked from air and ocean. 
Once the voyagers almost froze to death and once they found themselves the target of giants on a burning island.
Their journey was a mixture of great difficulties and wonders. It was such an epic adventure that many believe Brendan must have reached America - one thousand years before Columbus!