Bar Harbor

Bar Harbor, Maine is where Westover Hall military academy is located. The town is located on Mount Desert Island, which is off of the coast of the United States mainland.

The Titan's Curse
Thalia, Percy, and Annabeth go there to help Grover recruit the new demigods, Nico and Bianca di Angelo, who are son and daughter of Hades. It is also where they fought Dr. Thorn, the assistant principal of Westover Hall; lost Annabeth to Thorn's grips; and were first introduced to Artemis, the goddess of the Hunt and the Moon, and her Huntresses. Also, it is where they are first introduced to Apollo, Artemis' twin brother and the god of the Sun who takes all of them and the Huntresses to Camp Half-Blood in his sun-mobile, which is a Maserati.