![](https://static.dezeen.com/uploads/2016/07/the-18th-mile-of-hs2-ciaran-scannell-architecture-royal-college-of-art-rca-2016-graduate-show-london-tunnel-boring-machine_dezeen_sqa.jpg)
Ciaran Scannell proposes "fantastical world" in London's HS2 railway tunnels
Graduate shows 2016: the UK's high-speed railway network could incorporate an underground swimming pool, museum and concert hall, suggests Royal College of Art graduate Ciaran Scannell. More