Expensive Homes

The $23.5 million penthouse apartment in the landmark Clock Tower Building in Brooklyn, N.Y., is one of the hot properties that the New York City realtors Michele, Sabrina and Samantha Kleier of the HGTV reality show "Selling New York," have on the market. The 7,000 square-foot property has four enormous clocks with glass faces that look out onto the Manhattan skyline. (Courtesy Gumley Haft Kleier)