The Church of the Holy Sepulchre in Jerusalem. My experience of the Holy Land was that the more holy a site, the darker, smokier, gaudier and more carved up by religious factions it would be. Holy Sepulchre was the epitome of this pattern and thus utterly depressing. I should clarify that this pattern seemed to apply to Christian holy sites; there are obviously holy sites for several other faiths in this part of the world and I couldn't say whether the pattern holds true for them as I didn't visit as many. Hopefully they've avoided that particular pitfall.

I've only been to Las Vegas once, and briefly, but found nothing there that made me want to go back.

Cindy in Harrisonburg, VA http://sts.cmorf.com