Click on a picture to see a larger version. In the upper right corner, you can then click on the double arrow icon to expand the picture yet further and enter the "full screen mode". There are forward and back arrows ( < > ) on the left and right of the images, which allow you to browse through the entire set of pictures. (You can also click on "SLIDESHOW" to automatically scroll through the pictures.)
In the lower right corner of each picture, there is a downward facing arrow which lets you download a high resolution copy for free.
When finished looking at the large images, click the " X " in the upper right corner to return to the album home page.