On board the Cutty Sark.

Day out to Greenwich. Lots of alternative things to do - Royal Observatory, Maritime Museum, Queen's House. £20 for the Cutty Sark, £20 for the Observatory, £30 for both, museums free.

Extras: Cutty Sark, huge collection of ship's figureheads inside the Cutty Sark, a Fijian canoe called a drua, made with no nails. And finally a cat-o-nine tails, smaller than I thought it would be.