Remember the RMS Titanic? She hit one of those while on her maiden voyage from Southampton, England to New York City, in the year 1912.
The Titanic is long gone but the icy cubes are still coming down from Baffin Bay. They are pushed southward by the cold Labrador Current flowing along the shores of the continental land of the Province of Newfoundland & Labrador. This region is aptly named "Iceberg Alley."
Large icebergs are known to drift as far south as approximately latitude 40 degree North. There, they meet up with the warm Gulf Stream and rapidly melt away.