In the Game of Thrones episode (S05E08) where Jon Snow, the now Lord Commander of the Night's Watch reaches the Wildling's camp across the sea with boats to take the Wildlings to the south of the wall he reaches there with many small boats with him to take the free folks back to the safe place.
The boats were not big enough to carry a giant, and all they had was boats, even a medium size ship can't carry that giant (and there were no ships at all), still the giant reaches Castle Black with the them.
I can't understand how did the giant manage to travel through the sea to reach Castle Black without any boat or ship.
It's not that I am against the Giant going south of the wall :P But really how did it travel the sea?