The only way I can suggest to explore the most popular tourist destinations is to depend upon the destination location, time availability, and the traveler's travel taste. Walking tours are great for smaller areas and public transport for longer distances. I tend to weigh all alternatives against the issue of how I will navigate around. During my research on travels, I found tourhopers, an organization that helps travelers find information on traveling and give them ideas for their traveling experience. Consideration should be given to a hop-on hop-off bus tour, particularly in a city where there are several iconic sites. It gives visitors the option to visit another stop without having to continually make arrangements. When selecting a service, look at the map, frequency, ticket length, and attractions. It is often helpful to have them pre-planned so that you don't waste time in the city trying to plan them as you go.