This book includes the best-selected papers on the latest advancements in underground structures and geological engineering.The ongoing population growth is resulting in rapid urbanization, new infrastructure development, and increasing demand for the Earth's natural resources (e.g., water, oil/gas, minerals). This, together with the current climate change and increasing impact of natural hazards, implies that the engineering geology profession is called upon to respond to new challenges. It is recognized that these challenges are particularly relevant in the developing and newly industrialized regions.