Talk about your favorite website and why?

Hello friends, do you have a favorite website? Post your favorite sites here, and give an explanation why you like each site and we can share the information of some good site.

Do not post here your own sites please....


Personally I like slashdot, because even with a very poor layout, it has great sources for nerds like us.

I like a lot of favorite sites, as long as it's interface is very elegant and beautiful, open look gives a comfortable feeling like

There are lots of sites I like.
Amazon and e-bay for shopping online. Travbuddy and Couchsurfing are useful for my trips. And postcrossing is for my hobby.

i  think is google,It is a work of art