A good Manhattan walk I did today :- Left my apartment in Battery Park City, in the southwest corner of Manhattan. Walked down the shoreline and through Battery Park, with views of Jersey City, Ellis Island, and the Statue of Liberty, as well as boats coming in. At the southern tip of Manhattan, by the ferry ports, turn northeast and walk up through Pearl Street in the Financial District, then under the Brooklyn Bridge, along St James Place, and up the Bowery through Chinatown and the East Village until hitting Union Square at 14th Street. Then follow Broadway a few blocks until it intersects with 5th Avenue at around 23rd Street, then straight up 5th Avenue, through the touristy bits of Midtown (crowded!) until you hit the southeastern corner of Central Park at 59th Street. Then up 5th Avenue along the eastern edge of Central Park, past the embassies, and the Metropolitan Museum of Art, until reaching the northeastern corner of the Park at 110th Street.
There's a statue of Duke Ellington right there. I think it's about 7-8 miles including diversions and stops - not at long as the 14 miles or so to walk the length of Broadway in Manhattan. However, you see a lot more of Chinatown, get to see the Brooklyn Bridge, and walk alongside Central Park and up the Upper East Side, so it includes some areas not visited along Broadway. There's also the opportunity to either continue the walk up into Harlem, or spend a few hours in the Metropolitan Museum of Art, so it's certainly worth doing.
Neighbourhoods visited on this walk :- Financial District, Chinatown, East Village, Flatiron District, Midtown, Upper East Side, and a little bit of Harlem.