The picture is the best way to save those moments you want to preserve and all the moments you want to share with your friends. Use pictures as a design element is a great way to bring your unique design and style, besides that it will impress the viewer right from the start.
You can use the pictures in the background, header, such as the important factor. Many sites consider the choice of the beautiful photos is a key factor in design for good impression.
You can see the example below for reference.