1. Sea Cliffs: Steep rock faces along the coast that are formed when waves relentlessly attack the base of the cliff, causing undercutting and eventual collapse.

2. Wave-Cut Platforms: Flat, gently sloping surfaces that are exposed at low tide and are formed when waves erode the base of a cliff, leaving a platform at sea level.

3. Sea Caves: Hollows eroded into the base of cliffs by wave action, often formed by the concentration of wave energy in weaknesses within the rock.

4. Sea Arches: Natural bridges formed when waves erode through a headland, leaving a gap in the rock.

5. Stacks: Isolated columns of rock that are left standing after wave erosion has removed the surrounding land.

Let me know if you'd like to know more about any of these landforms!