here's a list of some sites with beautiful, inspiring pics.
of course there are hundreds, but these have pics i generally like a lot

http://zootool.com/popular
http://vi.sualize.us/recent/
http://imgfave.com/
http://ffffound.com/
http://enjoysthin.gs/
http://weheartit.com/
http://dropular.net/#drops

more: 
http://www.boston.com/bigpicture/ 
http://www.flickr.com/explore/interesting/7days/ 
http://www.ipernity.com/explore/whatshot 
http://1x.com/ 
http://500px.com/ 
http://pixdaus.com/ 
http://piccsy.com/ 
http://www.decaflon.com/ 

fun:
http://pictureisunrelated.com/
http://thereifixedit.failblog.org/
http://hackedirl.com/
http://myfoodlooksfunny.com/

will add more...

btw, i'm bookmarking pics i like at http://zootool.com/user/assbach/ and
autopost some of them to my tumblr.