line art icons for travel, bus and train symbols with mountains in the background, airplane window icon, simple line drawing, vector graphics, minimalism, simple lines, white background, vector graphics, monochrome, simple lines, vector graphics, flat design style, simple lines, vector graphics, monochromatic color scheme, white background, vector graphics, simple lines, in the style of vector graphics, simple lines, in the style of vector graphics, simple lines, --ar 73:39