Startup Idea : World Tours with a Difference

Remember those hop-on hop-off buses? How about those on a larger scale? If there is a country/continent where tourists want to explore at a cheap rate, there could be a lot of those buses that drive around the cities. Tourists can get of at stations and then take another bus to explore another part of the country/city. And these buses can be spread across cities and boundaries. It'll attract tourists because it will be as cheap as the public transport system for them. It would also help development because of the tourism growth.