Even in the United States, there are many places where a rental car is a liability, not an asset.  That is because parking costs, fuels costs, etc. can be real budget busters.  Try to research your destination on the internet, and find out which public transportation options exist.  You may be surprised at how easy, and affordable, this method of travel can be.

Take advantage of “backpacker tours”
Many destinations offer special backpacker tours for independent travelers.  These tours can be great ways to see the sights, meet great new people, and have a great time, all while saving considerable sums of money. 

Many of these tours allow you to purchase a ticket that is good for a specific amount of time, often a week or two.  The company that operates the tour usually has a fleet of vans or buses that make a specific route, stopping at major tourist destinations.  During the length of your, ticket, you can generally hop on and hop off at will.  This gives you the convenience of a guided tour, but allows you the freedom to spend as much or as little time as you want at each destination.

These backpacker tours can often be booked through local youth hostels, and hostels often feature flyers and information about tours that are available.  This is one more reason to take advantage of these great budget accommodations.

Take the bus – the tour bus that its
Many large cites have a number of bus lines that operate sightseeing tours.  These local bus tours often operate in a similar manner to backpacker tours, but they usually operate only in one city instead of covering a multi city route as most backpacker tours do. 

The advantage of these sightseeing tours is that they allow budget minded travelers to cover a lot of ground, and see all the major sightseeing destinations in a city, in a limited amount of time.  These tours can be great for backpackers who are traveling to many different cities in a short period of time, as they provide a great overview of the city and what it has to offer.