Well, there is a lot of architecture in liverpool, down the front, in the centre, in the business sector, all throughout liverpool. There is the two cathedrals, and don't forget china town with the magnificent gate.
As with everyone, a must do is the liver building, but try to do something different

.
What i found, is that liverpool is totally transformed at night time, so something that you think isn't worth shooting at day time, is very VERY photogenic at night time.
I reckon that it'll be interesting all through the weekend, doesn't matter when.
Of course, Pete is the guy to ask about what to shoot in liverpool.
Best thing i can say really, is get those comfy shoes on, and just walk. You won't get lost because the St johns beacon is seen all round liverpool, and that's near on centre of town.