You will usually be able to enjoy a different slideshow each time you click a menu selection button. When you refresh / reload the browser screen, in addition, you may be able to see a different slideshow from the same trip.
When you move the cursor over a photo, you will be able to see the right or left arrow on the middle of the each side. You can navigate the show using the arrows. On a touch-screen device, you may be able to slide the photo right or left to navigate the slideshow.
You can hide the main menu on the top to have a better view of a photo, and make the menu visible when you need it by using the button below the photo.
Click a photo when you want to see a map related to the current slideshow.