Good job! Here you are in the Big Apple. That's a nickname for New York City. It's the nation's largest city. There's a lot going on here, so you'll need a few days to explore.
Here's some information to get you started on your visit to New York City:
Official New York City Web Site
New York Photo Tours
National Geographic's New York Underground
Through the Eyes of a Child
Once you get tired of all the excitement here in New York City, it's time to move on to Washington, DC.
Which direction will you travel?