Majestic and sweeping, with a 60-foot stone archway at its entrance, this hotel has become a signature structure along Boston’s gracefully renovated harbor. It boasts gorgeous rooms to match its exterior, with marble bathrooms, expansive views of either the water or the Boston city skyline, and courtly service. Its Rowes Wharf Sea Grille has an appealing outdoor terrace in warm weather in an enclave alongside the harbor walk.