CG Geek has recently shared a guide to generating 3D terrains in Blender. 

The video will explain to you how to create 3D terrain maps using Google Maps and Blender. The best thing about this approach is that it's completely free, so you don't need to spend money on pricey tools. 

Basically, you will choose a place on the map, anywhere in the world, and then generate a texture using the Google data. First, make sure that you have BlenderGIS - an addon that allows users to use geographical data inside Blender.

The whole process is actually quite straightforward, so you'll be able to generate your own 3D map of the desired location in no time. 

Make sure to discuss the video in the comments. What other things would you like to learn about Blender?