Waves crash against cliff s. Rain pounds the ground. Winds howl across mountains. Winds whistle through caves. Welcome to the Hebrides islands. T e Hebrides is a group of islands off Scotland’s coast. Wind and water have shaped this land. Let’s tour these islands. Let’s see how nature formed them.


Water at Work We sail to our first island. Cold sea spray splashes our faces. Soon, we see the island through a curtain of mist. It looks like it is standing on top of many large, rocky pillars.


As we move closer, we see a cave in the rock. Seawater flows in and out. When the waves flow in, water seeps between cracks in the rock. As it does, bits of rock break free. T is is called weathering.


Waves flow out of the cave, too. T e water carries away the bits of rock. It washes them out to sea. T is is called erosion.


12 NATIONAL GEOGRAPHIC EXPLORER


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