That's not quite true. Maps are two-dimensional representations of the Earth's surface.

Here's why:

* Earth is a sphere: It's a three-dimensional object.

* Maps are flat: They are drawn on paper or displayed on screens, which are two-dimensional surfaces.

While maps can *show* three-dimensional features like mountains and valleys, they can't truly represent the Earth in three dimensions.

There are ways to visualize the Earth in 3D, like with globes or 3D modeling software. However, maps themselves are fundamentally flat representations.