" I love New York. You can pop out of the Underworld in Central Park, hail a taxi, head down Fifth Avenue with a giant hellhound loping along behind you, and nobody even looks at you funny.
Of course, the Mist helped. People probably couldn't see Mrs. O'Leary, or maybe they thought she was a large,loud,very friendly truck. "

― Rick Riordan , The Last Olympian (Percy Jackson and the Olympians, #5)