The ITACUS chair, Han Admiraal, met with representatives of ACTOS, the Colombian Tunnelling and Underground Space Association in Bogota, Colombia on 15 May 2017. The President of ACTOS, ing. German Pardo invited the ITACUS chair to give a keynote at the ACTOS conference in October this year. It was also decided to pursue further contacts to encourage local politicians and decision-makers to think about the use of underground space. Han Admiraal explained about the ITACUS Training Events that could be organised and the possibility of an ITACUS/ISOCARP Young Professional's Think Deep programme workshop. These topics will be further discussed in October.