So, the Media module has given us a nice interface for adding, browsing, and displaying media files. However, the images are taking up quite a bit of room. Let's create a pop-up gallery or lightbox, and show only one image. When someone clicks on an image, a lightbox will pop up, and will allow the user to cycle through larger versions of all of the associated images.
Drupal has a few different modules that offer an integrated lightbox solution for formatting sets of images. The following page, although somewhat outdated, offers a good overview of the different lightbox modules available for Drupal. Out of the whole bunch, I prefer the Colorbox module.