The 7,000 square foot penthouse at the top pf the 1914 Landmark Clock Tower Building New York City is on the market for $23,500,000. The highlights of this retreat are the four enormous glass-faced clocks that offer a 360 degree view of the city and the stainless steel and glass staircase that wraps around all three stories. If you have the cash for this property, you should practice reading clocks backwards before moving in!