The images shown here are thumbnail versions of the full photos.  Click on any of the thumbnails to open and enlarge that image.  Once any thumbnail is opened, you can scroll through the remaining images in that gallery using the right and left arrow keys on your keyboard or by clicking the arrows that appear on the right and left of the image.  There also is a full-screen slideshow option available by clicking on the arrow icon directly above the thumbnails on the right side.