If you don’t have the time to organise an itinerary or are afraid as this is your first trip overseas then a tour may be the thing for you. There are quite a few different tour operators depending on where in the world your wanting to go.
The 3 above seem to be the best indexed sites of tours that I could find.
You can also find free tours with people such as
Sandmans New Europe Tours – Though they expect to be given a tip at the end of the trip.
Though if your in Australia and enjoy quad biking then you might like some of the tours at Quadbikeking