Industrial buildings or infrastructure
Vehicles, such as cars or planes
People engaging in intense activities, such as sports or arguing
Crowds of people or noisy events
Graffiti or other forms of vandalism
Power lines or other man-made objects that disrupt the natural scenery
Dark, ominous clouds or other signs of severe weather
Trash or litter on the ground
Road signs or other reminders of human society
Animals in distress or aggressive behavior