If you are interested in a sightseeing tour of New York City, the most complete tours are the ones on a double-decker bus, which operate on a hop on, hop off basis. For example, Gray Line's All Loops tours, with a ticket valid for 48 hours or for 72 hours. You can see all of New York City and take stunning photos during the day and at night (the ticket price includes an evening tour called ”The Night Loop”).
There are numerous other tours, please explore the options, choose the route that works best for you and buy tickets online.
You can also save when purchasing combo packages, for example a bus tour + a ticket to MOMA, or a bus tour + cruise + a ticket to Empire State Building.
When the weather is good, we recommend to take a helicopter tour over Manhattan.