I'm working on a toolkit of sorts to make terraforming a less painful process. The link leads to the features I've built already, and I plan on constructing some riverbeds, lakes, and more valleys and canyons before doubling back to make new/different hills and mountains. Does anybody have suggestions for other geographical features I should make for this collection?

https://steamhost.cn/steamcommunity_com/workshop/filedetails/?id=2254112919