If history is your thing make sure you have sufficient time at Nelson's Dockyard - a delight. Do not wander away from the tourist areas - some of the residents can be a bit intimidating - be vigilent at all times..
We took a personal guide around the island which is beautiful with beaches alongside the active volcano in the north. Friendly people wanting to sell you a cool drink on the beach - heaven. Beware the water taxi from the cruiser dock - they transfer hundreds of passengers to the local beach which can not accommodate the numbers arriving.