Eastham , Massachusetts
Tel: 508 255 2575
Concierge.com's insider take:
Arnold's is by far the best of Cape Cod's many clam shacks. Named, regrettably, for the Happy Days diner, it turns out lightly battered shellfish (including whole-belly clams) and truly amazing homemade onion rings piled so high that they're hard to balance on the walk from the counter to your picnic table. The long lines move quickly; credit cards are not accepted.
Restaurant open daily 11:30 am to 9:30 pm, mid-May through Columbus Day; ice cream stand open daily 11:30 am to 10 pm mid-June through mid-September.