What makes Subterranea by IQ notable?

'Subterranea' is notable for its ambitious narrative structure and intricate compositions, leading to critical acclaim within the progressive rock community. It not only reached the UK Albums Chart but also solidified IQ's status as key figures in the neo-prog movement during the late 90s. By 1997, IQ had established themselves as a prominent band in the neo-prog scene with 'Subterranea,' their fifth studio album. This release followed their 1993 album 'Ever' and marked a significant evolution in their sound and storytelling approach, showcasing a more conceptual and cohesive work compared to earlier efforts.