Looking out my window on Mishaum Point, South Dartmouth, MA on August 7, 1992 towards Cuttyhunk Island, I saw several large vertical, pylon looking things.  Very strange indeed.   Some friends and I got in a powerboat to take a look and as we got closer, the verticals just got larger and larger until we realized the verticals were the stacks of a large liner. As it turns out, it was the Queen Elizabeth 2, which has touched bottom a couple of times going twenty five knots transiting from Oak Bluffs to New York. This nautical watercolor chart shows the exact spot where it first touched bottom. Details of the investigation are here.