Ok I am a rookie and not afraid to admit it.

So I have a couple of rookie questions if I may.
What is HDR? How is it done? Thanks for the info, I am trying out all kinds of new stuff with my ndew T2i.
HDR stands for "High Dynamic Range" photography, it's basically a post-processing thing that allows for "a greater dynamic range between the lightest and darkest areas of an image than current standard digital imaging methods or photographic methods." (
--Much more info -- - Probably way too much

).
While shooting, you basically take x number of exposure bracketed images (that is, the same image taken at several different exposures, I typically go light and use the simple 3 that my camera allows me to do automatically, all bracketed 1 stop apart) and then meld them together with some sort of software (I use PhotomatrixPro myself). It's best to use a tripod for sure (and a remote release) as any movement of the camera between shots can easily throw the final product all off (and you may not notice until you're at home in the computer). It allows for some neat effects, either more or less natural (I prefer the more natural looking ones, though some of them do work quite well all processed up).
As a note, I've barely done any of these, I'm very much a rookie at them (and previous attempts came out far less ideal

). I'm sure that those who have been doing them a lot have a lot more advice and stuff to say.
For example - This was the +/-0 exposure (so, the "base" one) for the image above. This is more or less straight out of the camera (some minor clarity, color, white balance tweaks, along with lens correction and some heavy spot removal as I forgot to clean up my lens before I went shooting ><).
Another example, this one with some different settings (contrasting against the originally posted more natural looking effects)