Cruise excursions are very expensive. Sometimes the ship will dock and you are able to get off and explore, other times a shuttle bus will be provided to take you into the place and you can do your own tour with the help of a town map. There is one drawback to this - if you go on an organised trip the ship will wait for all to get back on board - if you are held up on your own for some reason, it is a different matter. Our last cruise we experienced this problem - people were involved in some sort of accident in the town and could not contact the ship in time- it cost them the price of a taxi to the next port to catch up with the ship. On P and o they provide a daily newsletter and on this is a telephone number to contact the ship when you are ashore - always remember to jot this down and take with you.