You can create a gallery landing page that serves as a portal to multiple galleries. Once people land on this page they can choose what type of images to look at (e.g., weddings, newborns, portraits, commercials, food, fine arts). A landing page like this is also great for search engine optimization because it allows you space for text in addition to images.
Or you could feature a drop-down menu within your website’s navigation, with the names of the variety of galleries.
Which approach you take, is up to you. There is no right or wrong answer, just choices between different experiences you want a customer to have.
Once you decide on the layout of the menu, then it's time to figure out the layout of the gallery page(s). You could keep the gallery page(s) simple and just have the images load there. However, we recommend creating more targeted pages.