The new application Messages a iOS 7 it contains a much more efficient system for managing conversations with our friends, and apart from the possibility to view a timeline of received/sent messages, the application also contains a system for viewing all shared multimedia files. All you have to do is open an image, if you have more than one visible in the conversation, and press the button located at the bottom right, to view all the multimedia files shared in that conversation.
Unfortunately, the system will only display the files visible in the conversation, so if you want to view the ones sent a few weeks ago, you will have to use the Load More button to load older parts of the conversations.
