Fifth_Avenue,_Vanderbilt_mansion_and_Plaza_Hotel,_1910 Posted by PortableNYCTours on April 20, 2020April 20, 2020 5th Avenue, rear of Vanderbilt mansion. Newly built Plaza Hotel can be seen in the background, New York 1910 Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Like this:Like Loading...