The Shrewsbury Rocks are a wide area of rocky bottom that stretches from fourteen feet of water out to the fifty-foot mark off of Monmouth Beach. Some of the formations are twenty feet tall or more and can be very pretty under good conditions, which are unfortunately seldom this far north. The stone itself is a type of sandstone known as Greensand.
The "Southwest Mohawk" or "Coffee Wreck" is nothing like its namesake. Artifacts found on the wreck indicated that it was a late eighteenth-century sailing ship and not a barge.