It greets about 400000 travellers a year and never fails to thrill and amaze its visitors.

The striking turquoise pool holds six million litres of geothermal sea water which bubbles up from 2000m beneath the earth's surface.

By the time it reaches the surface, the mineral-rich water is a toasty temperature of between 37C and 39C.

The steamy waters are part of a lava formation.

The waters are situated on Iceland's southwest coast, 45 minutes from Reykjavik, the country's capital.

White silica mud settles at the bottom of the lagoon and can be used as a relaxing mineral-rich mud pack while steam billows in sulphurous clouds all around the waters.

The waters are said to have healing properties and are especially good for the skin, particularly for psoriasis.

There is even a special clinic on site devoted to the treatment of this skin condition.

Iceland, with its jagged valleys, huge fjords, dramatic cliffs, monumental glaciers and black sand beaches, has many otherworldly sites to amaze you. Visit the Gullfoss , which is a spectacular 32m waterfall.

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