Nemesis, the legendary inverted roller coaster at Alton Towers Resort in the UK, reaches a top speed of approximately 81 km/h (50 mph). While this might seem modest compared to modern hyper-coasters, the ride is famous for its intense "G-forces" and its unique layout. Because of local planning restrictions that forbid the park from building above the tree line, the track was built into a massive excavated pit. This creates a sense of extreme speed as the train dives into rocky ravines and maneuvers through tight corkscrews and vertical loops just feet away from the ground. Re-imagined recently as "Nemesis Reborn," the ride remains one of the most highly-rated coasters in the world for its relentless pacing and immersive theme.