First time visitors should, in our opinion, consider a guided tour to take you around and show you the sites. Mark down the areas you would like to revisit and/or explore more in depth and after the tour is over, either stay a little longer, as you paid for the flight already or come back another time.
On follow up visits we would suggest for the more adventurous to rent a car. If you are not too sure about driving a stick shift, which is the standard on most rentals there, we would recommend spending the extra money for ease of mind and get an automatic. Another