Run-down neighborhoods?

[Shane M]

I've read some real estate books that talk about how you don't want to own the nicest house in a neighborhood. Obviously the comps in the area are going to bring its value down, right?

Does this mean you should avoid neighborhoods that may seem a little run down all together? What are some sure fire signs of neighborhoods you should avoid? (I've found one that has run-down homes next to well maintained ones, probably in a 50/50 ratio).

What role do parks and schools play in evaluating a neighborhood? I would think if it had either, that is a good sign...

What about religious organizations like churches nearby?

Thanks!