A picture of Bar Harbor, Maine. In The Titan's Curse, Bar Harbor is the location of the fictional military school where Percy and his friends find Bianca and Nico di Angelo.
A picture of Battery Park in New York City. In The Last Olympian, Battery Park is the location where Percy goes to talk with the East and Hudson Rivers.
A picture of Central Park in New York City. This is another entrance to the Underworld in The Last Olympian that Percy and Nico use to get to the River Styx.
A picture of the Chrysler Building in New York City. In The Titan’s Curse, Percy and his pegasus Blackjack land on the building, and Percy has a conversation with Dionysus.