My girlfriend has some of the best visual collections on tumblr.
Her main blog, posts of art and photography and such, mostly of a creepily/disturbingly/oddly beautiful nature: http://thespianoge.tumblr.com/
Her pale/white minimalist blog: http://the-whiteness-of-milk.tumblr.com/
Her creepy mostly oddities and medical black and white blog: http://turbine-wax-heart.tumblr.com/
Her lips blog: http://cherrylips-swinginghips.tumblr.com/