What has been billed as the world's largest waterslide has now opened at the Hanwha Resort in South Korea.

Built by Canada-based waterpark design company WhiteWater West, 'The Abyss' stands nearly 30m (98ft) tall. Using four- or six-person rafts, its design is said by WhiteWater to feature bigger drops, higher walls and more near vertical oscillations than any other ride in its class.

The size of the Hanwha installation site - a small space on the roof of a building constructed partly underground - meant the WhiteWater engineers had to develop a special lightweight exo-structure to both minimise weight and fit into the area available.

Most of the weight is supported by angled concrete footings and pilings instead and less steel is visible.