The Smiler is a roller coaster located at which UK theme park?

The Smiler is a steel roller coaster located at Alton Towers in Staffordshire, United Kingdom. Manufactured by Gerstlauer, it opened in 2013 as the world's first Gerstlauer Infinity Coaster. It is located in the X-Sector area of the park. With 14 inversions, The Smiler holds the world record for most inversions on a roller coaster.

A key feature of the ride is the large metallic spider-like structure that serves as a centrepoint for the coaster track. Called ‘The Marmaliser,’ it has 5 legs, each with a distinct function to manipulate riders into "smiling". It is also equipped with a wraparound screen, which displays graphics and video relating to the theme of the ride. The roller coaster intertwines within the structure causing greater interaction with riders to enhance the experience.

Alton Towers Resort (often referred to as Alton Towers or ATR for short) is a theme park and resort complex in Staffordshire, England, near the village of Alton. The park is operated by Merlin Entertainments Group and incorporates a theme park, water park, spa, mini golf and hotel complex.