Agreed re Cruciform Building.
Just down the road (sort of), the Russell Square Hotel is one of the most amazing buildings int he world, let alone London.
The royal courts of justice are fun
who knows about the sludge incinerator?
http://images.google.co.uk/imgres?imgurl=http://www.deltat.co.uk/mech-handling/sludge.jpg&imgrefurl=http://www.deltat.co.uk/mech-handling/inf-0000.htm&h=256&w=231&sz=13&tbnid=P7uouFZKkcZTjM:&tbnh=107&tbnw=96&hl=en&start=2&prev=/images?q=crossness+incinerator&svnum=10&hl=en&lr=&ie=UTF-8
me and my mates cycled to erith on sunday and we were all impressed by it.