ALT A gray and black locomotive, marked with three stars on its front, pulls a long line of white rail cars along tracks surrounded by gravel. A bright blue sky provides a clear backdrop. Credit: NASA/Cory S. Huston

ALT Taken from a low, ground-level perspective, the image shows gravel and grass in the foreground as a white train car passes overhead. The camera angle looks upward, emphasizing the train's size against a backdrop of gray, overcast clouds. Credit: NASA/Frank Michaux

ALT A train crosses a bridge over calm water, its reflection mirrored below. Lush green vegetation frames the scene, and clear blue skies on a sunny day create a bright, picturesque landscape. Credit: NASA/Brandon Hancock