'I'm not a light switch, Lana,' laughed Emma.
'You know what I mean.'
Extinguishing the bright light just as she pushed the hatch open, Emma let out a low groan as she realised they were going from one to tunnel to another.
'What? What is it?' asked Lana as they both emerged into the darkness once again.
'Switch it back on please, Emma,' she sighed.
About two hours later, the girls had followed five different tunnels and had climbed nearly 30 different ladders until eventually, they came out into fresh air.
Laughing out loud as they emerged, the two had barely climbed out before realising they weren't at street level but were far higher than they'd imagined. Somehow they were standing on the rooftop of a particularly tall building in the centre of the city, with no obvious way down.
