Every media item that is uploaded to Wordpress can be viewed in a page. This can be seen if you browse to the Media section, hover on any item and click view. Are there any benefits to this because I am not seeing any at the moment. Can this feature be edited (or removed)?
It is desirable because you can modify that page, to introduce extra functionality.
If it troubles you, you can 'remove' the feature, by making an attachment.php template, and putting a wp_redirect() to the images full size URL.
I would avoid this however, as this is a good opportunity to show off and make the most of your content, e.g.:
Here, Matt Mullenwegs site uses attachment pages for gallery posts individual images, you can comment on images, you can navigate to the next image in the gallery and back, and upwards.