New York City - Grand Central Terminal Clock
There are about 750,000 people that pass through NYC's Grand Central Terminal each day, and most of them meet under its famous clock which has been in place since 1913. The clock, manufactured by Seth Thomas Clock Company, has 4 faces made from opal, and the rest is made of brass.
The Grand Central Terminal Clock is also a Hollywood icon appearing in several movies, and is also a favorite setting for marriage proposals. It has popularized the phrase "meet me under the clock."