This one is fun. Tell me where you live, and I can give you a rundown of what happened there in geological time, both recent and deep. I will give you an idea of what you can expect to find, should you go digging, and I can probably inspire you to get out there. There's a wonderland under your feet, and you'd probably be shocked to know what your desert/forest/mountainous homeland used to be. You'll receive at least five hundred words, more if your region is particularly exciting. (geologically speaking)