It’s really really hard finding quality images online that you can use legally. It’s a strange situation. There’s literally endless great photos on the web, but not many that you can use legitimately, especially if it’s for commercial purposes.
Sure you can scour Flickr or some of the stock photos sites out there, but that's time-consuming and it can be hard to sort through all the crud. Behold, Unsplash, a site that posts ten super high-quality photos every ten days for you to use anyway you want. Commercially. No credit needed to be given. Etc.
It’s really pretty amazing. Even if you’re not looking for a photo to use, you can spend a lot of time looking at all of the gorgeous images. Heavy on the VSCO/Golden Gate Bride/Iceland style shots but all around just very impressive.