To access archived websites, go to Archive.org, and enter a website address in the URL text box. On the history page, put the mouse cursor on a date to get a list of available snapshots for that day. To see a snapshot, click a time in the list.
The Wayback Machine takes snapshots of websites and stores them in its archive. As of July 1, 2015, this archive has 23 petabytes of data. Alternatively, go to CachedView.com, enter the website address in the URL text box, and click the Google Web Cache button. This retrieves the cached version of a website in Google Cache.