When you first click on the Browse Sites by Volume tab, you will need to expand the selection tree to select a site:
Click on the + button to the left of your photo series volume of choice (for example, III: Rocky Mountains)
Click on the + button to the left of a photo series (for example, LP: Rocky Mt. Lodgepole Pine)
Click on a site to view the photo and associated data tables (LP 02 displayed below).