Did you know that the New York Public Library sits atop the site where an Old Croton Aqueduct reservoir once distributed Croton River water to a thirsty NYC? That it took 5 times as many years to demolish the reservoir and build the NYPL as it took to construct the 41-mile long Old Croton Aqueduct? Back by popular demand, on Saturday we are repeating our March NYPL tour. Hear the stories and inspect old documents, maps and photographs from the NYPL's and other archives. View the underground foundation of the NYPL, with its base of Old Croton Aqueduct Distributing Reservoir stones.