Not much to do except for the Ruins at Olympia but they are amazing.
The tours through NCL are great. A lot of walking and steps for the best tours so be prepared. All seem a little pricey but with gas at 10 to 12 $$ per gal I can see why. All the sites are a good drive from the port.
Same as the other museum. If we did it again would not go the museum route but for first timers I thing you need to do the museums to get the full picture of how old these sites really are and how amazing the site really are.
Pompeii Walking Tour Rating:
Amazing site. Going back in time. A wonderful tour. Lots of walking