The RN's Historic Dockyard at Portsmouth is where the famous HMS Victory and HMS Warrior are on display and of course visiting this was a major part of my holiday in Portsmouth!
I was able to go aboard Victory (which personally i didn't like so much as everything was so low i had to stoop down everywhere!), Warrior and the WW1 monitor M33 which was my favourite. I was also able to see the current RN in the form of HMS Diamond which was easily visible from the dockyard. You can see my photos here, the dockyard is a great place to visit.