Solomon's Island
Solomon's Island is a gold mine, but either there's too many regulations or just not enough cash for anyone to invest it.
Calvert County ought to invest in buying up the properties and zoning everything there commercial. They could bring a lot of jobs and even more tourism to the area if they'd just try to attract some 'beach-type' businesses.
My college town did a similar thing with a run-down area that sat on the banks of the river. Since the county laid the necessary the groundwork, it has exploded with growth. There's a nice movie theater, several new restaurants, and a handful of new nightspots. You combine that with the bay, the river, the view of the bridge, the marinas, and you have a lot of potential. The city of Solomon's Island could rival that of Annapolis (though I've never been to Annapolis, but I've heard it's pretty cool.)