They call it the tallest, steepest and longest 'tornado' slide on the planet, and it's nearing completion at Adventure World.

The ProSlide Tornado 60 is set to thrill adventure-seekers who dare to attempt the 260-metre ride, reaching speeds of up to 6.7 metres per second, zero gravity andheart-pounding drops.

"Two years ago we invested $12 million into the Abyss rollercoaster which was claimed by the founder member of the Australian Roller Coaster Club to be the best in Australia," Adventure World CEO Mark Shaw said.