If you have a lot of pictures in the Photos App, it can be time consuming to scroll through pictures to find what you're looking for. Luckily, there is an easy shortcut to scroll to the top or bottom of the pictures in an album.
Go to the Photos App and open an Album. It will show you the place in the album where you left off.
To get to the oldest photos, tap the top of the screen, near the time. You'll go to the oldest photos.
To go back to the most recent photos, tap the bottom of the screen, in between 'Photos' and 'Shared' or 'Shared' and 'Albums'. You'll go to the most recent photos.