The National Center for Atmospheric Research (NCAR) Mesa Laboratory sits nestled against the foothills of the Rocky Mountains in Boulder, CO. In addition to being an amazing architectural landmark designed by I.M. Pei, this world-class research laboratory focuses on an understanding of Earth system sciences including atmosphere, weather, climate, and the Sun, which is the ultimate source of energy for Planet Earth. Explore the NCAR Mesa Laboratory and the importance of Earth systems to our society with a live NCAR guide on this interactive, virtual tour.