you see thalf moon, which was henry hudson's ship. the other side is a windmill, which refers to the original dutch settlers of new york. and then on the top is the great monumental sculptural element, which has three gods. >> the gods -- hercules, mercury, and minerva -- came from greek and roman mythology. they represent strength, commerce, and wisdom. even the clock is special. tiffany glass lines the numbers and the hands. >> it's very difficult to see, but when the light shines on it, it's quite beautiful and picks up in different colors. this is a really wonderful -- probably one of the most spectacular places to be in grand central and in the entire city. not very many people actually get to come up here. but what you can see from here that you can't see from down below -- first of all, you get a sense of the scale of the building, how large it really is. you get to experience the many different kinds of motion that occur here. kristen, behind you is the information booth, which is really at the center of the main concourse. it