This superb Flickr set has more than a 100 pictures of discarded neon signs.
The pictures have been taken at a place called the Neon Museum, a non-profit organization in Las Vegas.
Snip from the site:
Our collection ranges from the 1940s to present day. Some pieces are restored as public art and mapped for our walking Tour. Others are kept in our Boneyard which is available by advance private appointment only.
Educational programming revolves around history, design and popular culture primarily focused on Las Vegas. We are also extensively involved with the media and film industry as a location for shoots of all types.
Link to the Flickr set.
You can also visit the museum’s official website to know more about these beauties.