The seawater pool was built on the site of a natural rock pool that people have used for bathing since the late 19th Century.

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We cooled off with a quick dip in the rock pool's icy waters and the blistering afternoon sun was quick to warm our shivering bodies when we emerged.

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Overwater has a pool carved into a massive rock above the sea and an infield of decking.

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The ornate pool was transformed from a rock quarry in 1923, and includes decorative canals, fountains, waterfalls and coral caves, while palm trees and porticos provide some welcome shade.

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After negotiating their way down a series of steps carved into the steep rock face, explorers of the Blue Lake Grotto are faced with a deceptively deep pool of limpid blue-green water.

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"We have to get a scuba diver to clean the pool every week, " she adds, noting that a green sludge forms on the rock when it's not regularly cleaned.

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