How do I access the All People group/page in a SharePoint 2013/2010 site collection?  

In Microsoft Office SharePoint 2007, you could remove the user from the All People group and re-add them. This option is no longer available in SharePoint 2010/2013. SharePoint 2010/2013 removed the page from navigation, but you can still access the All People page by appending the following to the root URL of the site collection.

SharePoint 2013
/_layouts/15/people.aspx?MembershipGroupId=0

SharePoint 2010
/_layouts/people.aspx?MembershipGroupId=0&FilterField1=ContentType&FilterValue1=Person