The Terrainator is a unique site that allows you to select a region to have printed in 3D. It works by zooming in to a map of a terrain, such as the Rocky Mountains pictured below, selecting the area you want printing in 3D and then proceeding to the checkout to have it printed in 3D.
Price wise, expect to pay around $45 USD for a 3 inch model. Model size will vary on the size of the region you select and the options you choose when buying.
It's certainly a unique service that offers a different approach to viewing the mountain ranges across the world. In saying that, at the moment the service is limited to the west of US, UK and the Alps.
You can check out the service over on Terrainator.