Galleries is a new feature by Flickr. Basically, with Galleries, you can create showcase and assemble collections of up to 18 photos –and this time not just your own shots.

According to Flickr blog:

There’s a long list of features that we’ve wanted to develop for our members. Giving our members a way to celebrate the creativity of their fellow members has always been high on that list. Today, we’re thrilled to launch our newest feature: galleries.

For whatever you find interesting, fascinating, or mind-blowing on Flickr, galleries are a way to curate up to 18 public photos or videos of your fellow members into one place around a theme, an idea or just because.

To create a Gallery just go to a photo or video that you want to add and click "Add to gallery." From here you can create a new gallery or add the image to an existing one. The "Add to gallery" icon will be available on "safe" photos and videos. If you’re viewing content and don’t see the icon, it’s because the member has decided not to allow their content be available for galleries.