The World Tunnel Congress 2023 (WTC2023) organised by the Greek Tunnelling Society (GTS) and the International Tunnelling and Underground Space Association (ITA) will take place in Athens from 12 to 18 May at the Megaron Athens International Conference Centre (MAICC). The event returns, once again, in a hybrid format, giving the option of a virtual participation through its platform, where sessions and scientific papers will be available. 2,000 professionals are expected to attend this major international tunnelling event featuring most of the industry’s key players. This year’s edition main theme will be “Expanding Underground”.