Why don’t all stations go crazy deep? Money. Digging deep costs a fortune. Each extra meter means more concrete, more pumps, and more stressed engineers.
How DEEP is your commute? Incredible charts reveal exactly how far
Plus, deep tunnels need ventilation. The Tube gets hotter the deeper it goes—by about 1°C every 30 meters. The Circle Line is a toaster. The deep parts are a sauna with a train.
Fun fact: London Underground has its own weather. Deep tunnels can hit 30°C (86°F) in summer. You don’t need a coat. You need a fan and a cold drink.
