In the add mesh menu, If you click on the button labeled Landscape, It will add a relatively cool looking mesh.
However, once I put my favorite color on it, This mesh seems pretty useless.
It actually looks kinda like Mt. McKinely
The only possible use I can see is if I wanted to go into sculpt mode and modify it further, Then it could have some use as a base mesh to save you some time instead of sculpting from a plane. Is there actually any practical reason to use this button? or is this feature just another pre-made mesh like Suzanne and teapot?