Best websites debunking bad science please

I’m looking for good websites debunking things like hoax moon landing theories, chemtrails, Mars faces, that kind of stuff.
Any recommendations?

badastronomy.com is a good place to start.

Another good one is crank.net

(no, that’s not what it may sound like)

Can’t forget the good ol’ skeptical inquirer (www.csicop.org).

Then there’s junkscience.com

A bit of a note about this one. The author tends to push his own beliefs quite heavily, some of which are kind of loopy (DDT is a good thing?). At least he cites sources though, so you can check out for yourself.

The Skeptic’s Dictionary is another good debunking site.