A picture of Times Square in New York City. In The Battle of the Labyrinth, Percy and his friends meet Rachel Elizabeth Dare in Times Square to ask for her help.
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 South Shore of Long Island, New York. This is the opening location of The Last Olympian where Percy is hanging out with Rachel Elizabeth Dare.
A picture of the Gateway Arch in St. Louis, Missouri. In The Lightning Thief, this is where Percy encounters a monster and jumps from the top of the arch to the water below.