Tranquility Base Hotel & Casino is the 6th and last Arctic Monkey’s album, and so far one of the best rated. Some critics have dared to say it’s a masterpiece, and I agree.
The album is a delightful architectural experience because it’s a musical tour of an imaginary retro-futuristic hotel on the moon. The cover of the album is in fact an architectural model of said hotel, designed by the leader/singer/songwriter of the band, Alex Turner.
Turner began by drawing a hexagon, to reflect the band’s sixth studio album, eventually drawing influence from architects Eero Saarinen and John Lautner, becoming «quite consumed» by the process.
Arango Marbisa house by John Lautner 
TWA Flight Centre by Eero Saarinen 
Gateway Arch by Eero Saarinen
The artwork was initially inspired by a photograph depicting the set for a lunar Hilton Hotel being built for 2001: A Space Odyssey (1968). Turner began imagining a model of the titular hotel within its lobby
Bibliography:
https://www.theguardian.com/music/2018/may/13/arctic-monkeys-tranquility-base-hotel-obsever-review
Alex Turner explains the artwork to Arctic Monkeys’ ‘Tranquility Base Hotel & Casino’