nature = not man-made
sea - storms at sea, sea sprout (like tornado but in water),
whales, great barrier reef
land - active volcano, rainforest, snow-capped mountains,
deserts (ice and sand), steppes/grassland, wildflower-covered
fields
air - thunderstorm, lightning, northern lights (aurora
borealis), cloud formations, tornados/hurricanes/cyclones, sand
storms, those weird rock shapes formed by air blasting