1. Canyons: These are deep, narrow valleys carved out by the erosive power of rivers over long periods. The Colorado River has carved the Grand Canyon, a prime example of this process.

2. Sand Dunes: Wind erosion is responsible for creating these shifting mounds of sand. The wind picks up sand grains and deposits them in areas where the wind slows down, forming dunes of various sizes and shapes.

3. Sea Cliffs: The constant pounding of waves against a coastline can erode the rock, creating dramatic cliffs that rise up from the ocean. These cliffs can be found all around the world, with varying heights and features.