One of the most wild things I've seen is the elevation signage in the Everglades, just north of the keys. They range from 0-1m above sea level. The ecosystems change drastically depending on minuscule differences, with forests on hills that you can't even distinguish from the grass marshes beneath them. It's like the first time I saw a massive wildfire, this feeling of existential dread as it suddenly becomes clear just how vulnerable we are to climate change. An area that took five hours to drive across, one of the most ecologically vital places on the continent, will just be gone.