Rick Riordan
     locations from Percy Jackson and the Olympians: The Battle of the Labyrinth
      
    East 81st Street, overlooking the East River
    Goode High School
      
    The desert, outside Phoenix, Arizona
    Chris Rodriguez appears, babbling about string
      
    Alcatraz
    Briares is imprisoned
      
    Knossos
    Daedalus and Icarus fly over the city and away from Crete
      
    Etna
    Typhon is imprisoned before moving to Mount St. Helens
      
    Mount St. Helens
    Typhon is imprisoned
      
    The Marriot Marquis, Times Square
    Percy and Annabeth find Rachel participating in Urban Art for Kids; they re-enter the Labyrinth in the basement
      
    The Garden of the Gods Visitors Center, outside Colorado Springs
    Percy and his friends land after fleeing Daedalus' workshop
      
    Western Museum of Mining and Industry
    Percy and his friends reenter the Labyrinth
      
    Carlsbad Caverns
    Pan's grotto