Swindon
From Jenny Everywhere Wiki
In one universe, when they visited Swindon, Jenny Cornelius and Laura Drake faced a “steam-powered mechanical giant”. (PROSE: Birds and Snakes)
Behind the scenes
Swindon in our world was the home of Isambard Kingdom Brunel, a 19th century engineering genius who certainly would have tried building steam powered mechanical giants if he'd been exposed to modern anime.