[kimchi]

Most things in London require plenty of cash. Many museums are free, but I'd also suggest a walking tour (unless it's drizzling - highly likely).

You can search the internet for specific maps and itineraries and just plod along the route yourself. I'd have a look around Camden Town (Get off a Morington Crescent tube ststion and head north (uphill)), just north of Euston Station. I used to live there and it's a kind of retro/prog hang-out with a big alternative scene (if that makes sense) Lots of markets, bars and a nice canal you can walk/take a boat trip along.