Here is a section of a world map. Nice, especially if you like hex maps.
Here is a nice version of the Caves of Chaos.
Here is one map which is part of a whole collection. I really like these--basically a bunch of geomorphs. Something for me to try my hand at, perhaps?
And for a collection of discussions regarding mapping, I offer this, this, this, and this. I'll not offer any editorial on these discussions other than to say I think that his thoughts are common to many of us. I enjoyed reading them.
Here is an old post about a map. A hex map--in a novel. How cool is that?
And although I personally don't review mapping products (yet), here are a few posts reviewing some: This one, and this one, and this one.