Begin your exploration of the seashore by taking a look at the center's excellent exhibits about this unique environment. After all, since you're undoubtedly going to spend a fair amount of time on the beach, you might as well find out how it came to be, what other creatures you'll be sharing it with, and how to avoid harming it or them.
Occupying more than half the landmass north of Orleans and covering the entire 30-mile oceanfront, the 44,000-acre Cape Cod National Seashore is a free gift from legislators who had the foresight to set it aside as a sanctuary in 1961. Take advantage of the excellent educational exhibits and continuous film loops offered here; particularly fascinating is a video about the 1990 discovery of an 11,000-year-old campsite amid the storm-ravaged dunes of Coast Guard Beach, which was about 5 miles inland when these early settlers spent their summers here. After absorbing some of the local history, be sure to take time to venture out -- on your own or with a ranger guide -- to the surrounding trails.
Note: For more information about the Cape Cod National Seashore, journey up to Race Point, in Provincetown, where another visitor center is tucked into the dunes.