A new ride is being installed at Alton Towers in Staffordshire.
ITV has been given exclusive access to the first rollercoaster attraction to be installed at the theme park since the Smiler in 2013.
The new ride, known only as SW8 - Secret Weapon 8 - is a wooden rollercoaster, marking a step away from more commonly seen steel structures.
Work began on the attraction two years ago on the site of the old Flume ride in the centre of the park. It took more than 100 construction workers to pour the concrete for the foundations after 50,000 tonnes of earth was moved away.
The theme of the attraction remains secret but the creator says it won't be just a rollercoaster made out of wood.
The wooden rollercoaster itself is just one small part of the experience.
''Once you're in there and going through the theatrical experience and you're hearing the story, you'll completely forget about that and this is one of the most compelling themed attractions we've built in a very long time.''
– BRADLEY WYNNE - CREATIVE DIRECTOR
The SW8 will be tested 500 times with the ride cars containing water-filled dummies, and then extensively re-tested using real people.
It will debut in March 2018 when Alton Towers re-opens after a winter break.