LogInCheck out the map-making tool, Campaign Cartographer 3+!
With CC3+, you can easily create any world you can imagine. The tool is quite fast, so if you don't want to spend a lot of time, then it will work perfectly for you. The key feature of the tool is its simplicity that doesn't lead to a lack of quality. You can learn and understand what you want in minutes.
The areas, where you can use it, is quite diverse - from designs to games of any genre.
Check out some examples of what this tool is capable of.
If you are a new user and want to learn how to work in CC3+, we suggest checking this video tutorial from Joshua Plunkett.
Visit the website to find out more about the tool.