If you do nothing else in this city, you must take the Gray Line Tour. It is truly the only way to see everything in one visit. I would take the 48-hour hop-on, hop-off, and be sure to do all loops. Don't forgo the night loop, which takes you out of Manhattan and gives you a fabulous view of the skyline on your way back in. The best part is that you can hop on and hop off--no trying to find cabs or subway stations. It is truly the greatest way for a first-timer to see it all. Heck, I've been five or six times and still love to go on these buses, as each tour guide has a different story to tell and a different landmark to note. This will be the best money you spend if you are truly going to see it all.

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