ITACUS is one of four permanent committees of the International Tunnelling and Underground Space Association, with the mandate to reach out to policy leaders, NGOs and interrelated disciplines. ITACUS presents at worldwide congresses, seminar and workshops to create awareness of the undergrounds potential but also to foster the integration into the urban fabric through planning and applied uses. We work closely together with our global partner ISOCARP, the International Society of City and Regional Planners. We actively contribute to the work of both UNDRR and UN-Habitat. With ISOCARP, we have developed a 'Think Deep' publication on the planning of the underground containing several urban case studies. Our Young Professional's Think Deep Program (YPTDP) is well underway, inviting young interdisciplinary professionals from the built environment to work on real city cases jointly. Currently, we are looking for further cities to participate. Many countries (such as UK, Sweden, Australia) have now started local Think Deep National Actions Program (TDNAP) groups with guidance from ITACUS. Read more about our exciting activities in our News, Announcement and Activity Group sections. ITACUS believes in an urban underground future. The urban underground space in our experience is an often-overlooked asset of cities. As such underground space should play a vital role in the quest, many cities are undertaking to combat lack of space. Cities need space for housing, for infrastructure and public spaces. As demands on cities grow in terms of spatial requirements, they also must cope with climate change. They need to become more resilient against natural disasters. Cities need to mitigate and above all, adapt. The urban underground can provide solutions for helping cities achieve this. ITACUS has launched activity groups dealing with relevant topics, such as urban adaptability, urban sustainability, urban integration, and the circular economy.