Pamper yourself or share with a friend a $500 gift card for spa services at INTERLOCKS! Located in the heart of historic Newburyport and overlooking the harbor, INTERLOCKS is a haven for those seeking first-rate beauty and wellness services on Boston's North Shore. A Best Of Boston award-winner and noted as one of the Top 200 Salons in America, the Interlocks staff of nearly 50 offers exceptional salon and spa services in hair, body, skin and nail care.