"On December 11, 1858, Central Park welcomed its first official visitors, the ice skaters. Roughly 300 people showed up on that first Sunday. A week later, 10,000 descended on the park. New York, suffering through the latest in a series of unseasonably cold winters, fell quickly into an ice-skating swoon... The Lake, the site of future ice skating, was in reality a low-lying piece of swampy ground. Before park construction began, it existed only on Olmsted and Vaux’s ten-foot blueprint, where the squiggly, naturalistic contours of its shoreline were rendered in india ink. To fill it, clay pipes carried rain runoff from the carriage paths and other spots in the park. To drain it, a series of sluices could be opened. Some of the sluices fed into natural springs running under the parkland, and certain springs, in turn, emptied into New York’s East River... As the winter drew on, sometimes as many as 100,000 people a day visited the park. Skating proved so popular that the park was kept open well into the night. The Lake’s icy surface reflected the glow of newly installed calcium lamps. Vaux went skating. There is no record that Olmsted did."

For more on Central Park Lake, check out this excerpt Justin Martin's biography of Frederick Law Olmstead in Gotham: A Blog for Scholars of New York City History.