Yeah, I've also got a thing for 70s urban dereliction. And I know what you mean when you talk about them as sort of 'landscape films'. There's a specific atmosphere to those settings.
I remember as a teenager going to the Scala in Kings Cross, when that area was still really sleazy. I'd never seen a prostitute or a junky before I went to Kings Cross and I'd always love coming out of the cinema after watching something like Maniac or Vigilante to see my own equivalent on the walk back to the station. It's criminal how clean Kings Cross now looks. Along with Soho it used to be my favourite part of London. (Soho's another area that's had much of its soul polished out of it now. Vegetarian options at the Coach & Horses?!?)