Acciona Helsinki seawater heat recovery tunnels (image Acciona press release: https://www.acciona.com/updates/news/acciona-enters-finland-worlds-third-longest-undersea-tunnel/?_adin=11551547647)

Iceland Vestmannaeyjar (screen shot from Apple Maps)

Implenia Stockholm Metro connecting tunnel BIM model (copyright Implenia media release)

Mitma . Modernización del túnel de Peña María de la A-1 (Mitma sala de prensa)

Webuild unites two lots on Brenner Base Tunnel as work proceeds on world’s longest railway tunnel Webuild press release.

Webuild Consortium wins Romanian highway contract worth more than €1 billion Lot 3 of Sibiu-Pitesti Highway Project Infografica of Webuild Group

Terratec Bangkok shft TBM picture (Terratec picture)

Terratec Bangkok picture (Terratec supplied picture)

Vancouver Broadway Subway (BC media)

Prague Metro Line D Route Map OpenStreetMap contributors, ODbL, via Wikimedia Commons