We got the train down for a cost of £13.55 each: not bad at all! The first thing we did was walk along part of the walls that surround the old city (prompting many 'storming York' photos) on our way to the York Minster, which is the stunning gothic cathedral you can see n the photos above. Inside the cathedral is a lovely war memorial dedicated to the pilots who died in World War II: the clock is designed to show the world as a pilot would see it whilst flying.
The old keep from the original York Castle is still standing, and is known today as Cliffords Tower. For £3.00 you can clamber up the incredibly steep manmade hill to the tower itself, which has plenty of winding staircases, photo spots and rooms to occupy you. It has one of the best views of the city, with signs pointing out some of the more important buildings.
All too soon it got dark, so we only got to the ruins of St. Marys Abbey in the grounds of the York Museum as dusk fell. One of the victims of the dissolution of the monasteries in the rule of Henry VIII, the original building was destroyed in 1539. The ruins are in the botanical gardens that surround the Museum, and which are free to enter.
Finally, it came time to depart. One little known fact for the Harry Potter nuts amongst you is that the bridge on which Harry recieves his tichets from Hagrid in the first film is the one in York: there aren't any bridges in Kings Cross because it is an 'end of the line' station. You might look a little odd taking photos on what seems to be a perfectly ordinary bridge, but every American I've taken to York so far has done so, and why not?
I hope this gives you some ideas for future trips out, as York is really a fantastic city, one of the few really traditional English cities left. Plus, it's not a bad place to shop in either...