One of my friend suggested this awesome new site for free stock photos website. There are thousands of unique public domain photos, all high-resolution and free to use for any purpose. They specialize in photos by location as document cities, national parks, state parks, national landmarks, and many more.They updates 20+ photos each week. You should try this once... :)
This is also suggested by my friend in comments, I have personally checked it out & really trust me I'm shocked that how can I leave this. I have seen this site for first time and it really fully impressed me. I suggest you to check it out once. it will not let you down at all. We just have to signup once and it's all set to download our photo.