Price: $1+ (pay what you want)
Number of photos: 164
Download size: 1.68GB
Shot at the amazing Steven F. Udvar-Hazy Center
All 18GB of my travel reference, all for free. Use it for personal and commercial projects with zero attribution.
The photos are all at the full resolution from my camera and feature landscapes, architecture, wildlife, skies, and more. These work great for photobashing as well as they do for studies.