You can plan your own holiday and part of that might be organised day or two day tours if you are interested. It might be cheaper and easier than renting a car for longer trips.

get a big tour guide book and see what you want t do, DK or frommer is good, lonely planet is clueless. Booking is so easy now because internet.

Think of it this way, you live in a really big city so you already know how to do this :)