Nemesis Sub-Terra is a drop tower dark ride at Alton Towers theme park. The ride opened to the public on 24 March 2012. The ride has not been operating since June 2015 however it is still standing and listed on the Alton Towers website and it is currently unknown whether it will ever be in operation again.It is loosely adapted from the concept of the park's 1994 inverted roller coaster, Nemesis. It is themed on the discovery of a nest of eggs in a network of underground caves.