1. Volcanoes: These are the most obvious and well-known. Magma rises to the surface and erupts, forming a cone-shaped mountain. There are many types of volcanoes, each with unique characteristics depending on the magma's composition and the style of eruption.

2. Calderas: Large, bowl-shaped depressions that form when a volcano's magma chamber empties, causing the overlying rock to collapse. They can be very impressive, often hosting lakes or even towns.

3. Lava Domes: These are mounds of solidified lava that form when viscous magma pushes its way to the surface but doesn't erupt explosively. They can be small or large, and are often found inside the craters of volcanoes.

4. Lava Flows: When magma flows out of a volcano onto the surface, it's called lava. These flows can travel great distances, shaping the landscape as they cool and solidify. Lava flows can create flat plains, valleys, or even hills depending on their thickness and the terrain they travel over.

5. Batholiths: These are enormous, underground masses of solidified magma. They are usually granite, and can be so massive that they can influence the surrounding landscape. Batholiths often become exposed over time as erosion wears down the surrounding rock, creating impressive mountain ranges.