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To describe them, different rock structures that are formed by natural processes have been given various terms by geologists. A stack is a rock formation made up of a steep or upright column or columns of rock in the sea near a coast. They are formed when part of a headland is eroded by water crashing against the rock or as a result of wind erosion. These impressive formations are intricately created by nature only through time, tide and wind.

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Travel around the world and see these amazing caves.

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Let’s explore the world’s most unusual and extraordinary lakes.

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Some of the world’s most important and captivating bays.