Introduction to Fifth Avenue: Fifth Avenue is an important north-south thoroughfare in Manhattan, New York City, USA, starting from Washington Square Park in the south and ending at 138th Street in the north. Because Fifth Avenue is located in the center of Manhattan Island, the east-west streets on Manhattan Island are sometimes called east-west with this street as the boundary. An album released by Elva Hsiao and a perfume released by Arden were both named after Fifth Avenue.