On the wild tip of the Cape, this Cape Cod National Seashore beach is a breathtaking stretch of sand, crashing surf and undulating dunes as far as the eye can see. Kick off your sandals, kids – the soft, grainy sand makes for a fun run. This is the kind of beach where you could walk for miles and see no one but the occasional angler casting for bluefish. Parking costs $20 in summer (the National Seashore fee).