Richard Hammond is visiting the construction of the massive 55-kilometre-long Brenner Base Tunnel in Austria. The 20-year-long project is estimated to produce 21 million cubic metres of rubble, but where does it go?

Like Discovery Australia on Facebook:   / discoverychannelau  

Visit our website: https://www.discoverychannel.com.au/

Subscribe to Discovery Australia for more great clips: https://bit.ly/DiscoveryAustralia