Magelan strait,23.06.2003.
This is indeed the wreck of a c3 type freighter.
She is Grace Line's Santa Leonor that was wrecked and abandoned at Isabel Isles in 1968.
For more information check: http://www.navsource.org/archives/10/03102.htm

Notice, some missing plates from her side, probably removed to salvage her cargo or machinery parts.