you can see an awful lot just by going to the National Park, go to the homestead entrance (take the tollroad right to Homestead) and try to drive as far as possible on the roads, stopping at the various boardwalks, that is one entrance fee of maybe ten dollars. If you are there at sunset, you will see an incredible amount of alligators and birds, and if you are unlucky, you will see a bird eaten by an aligator.also Shark Valley, a further drive on Alligator alley has a wonderful tram ride through the everglades.It is several miles long and then you climb a tower to see the everglades. when we did the ride, we saw at least 200 alligators and numerous birds. I have never taken the airboat but have been to the everglades many times. we were going to take a tour when we were in Miami til we discovered they were driving us allt he way back to the other coast, where we live.