I know OS X has a
~/Sites folder with its own icon for keeping your websites, and it isn't there by default, you have to create it.
Are there more folders similar to this one that receive special icons after creation?
For storing apps that you want to be private to your account, and does have a 'special icon' (the icon of /Applications) upon creation.
For storing your websites. Accessible on the network as /~username.
If you're not already aware, there's a ~/Library which is hidden, but does have a 'special icon' if you unhide it using