Top of vintage highrise building with globe and clocks. Along Broadway, above the 12th story, is an ornate clock tower, with a mechanically wound clock.Story penthouse is placed above the original roof. A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future. For more than 60 years, the 14story building built in 1927 at 2927 Queens Plaza North was the tallest commercial building in Queens. Each clock on the building is 26.5 feet in diameter; each number measures 4 feet in height. The minute hands alone weigh half a ton each. A very tall building with a clock on it's side. The Makkah Royal Clock Tower is a triumph of engineering. At 35 times the size of Big Ben it has the world's largest clock.