Well I don't know about Detroit, but Camden seriously does have some beautiful architecture. The shabbiness surrounding it acts as juxtaposition. Sure there are a lot of areas like the picture Mosh posted, but I'm more interested in the glorious buildings. The city used to be very prosperous. The Campbell's Soup cannery was located here and everyone was employed. RCA Victor also had its factory here. Camden was a city on the grow. Then in the 1960s came the downturn. Factories closed, city residents moved into the nicer suburbs and the city was gutted. There's been very little improvement since the 1960s apart from the decay of the impermanent portions of the city and what this means is that the whole place is like a war zone studded with glorious relics from the 1920s to 1950s period. Many of the original 1940s-style advertisements and signs are still up even on the buildings that are succumbing to the ravages of time.
Here's what Camden used to look like. Many of the most prominent buildings are still in place even if homeless people now make their nests in among the columns. My very apartment is among the photos, too.
PS - Lucas, I looked it up and the building i was talking about is this one:

It was worth $2M in 1928 according to old newspaper clippings, so with current inflation that would bring the pricetag to something around $25m. Maybe we can haggle.