Agua Negra -

: A massive 14 km bi-national tunnel is planned to allow year-round travel, bypassing the high-altitude pass which often closes during winter. 🔬 Science: Glaciers & Deep Physics

: Deep within the planned tunnel, scientists intend to build the Agua Negra Deep Experiment Site (ANDES) , the first deep underground laboratory in the Southern Hemisphere, focused on dark matter and neutrino research. 📚 Arts & Culture Agua Negra

This international pass is one of the highest border crossings between Argentina and Chile, reaching an altitude of 4,765 meters (15,633 ft). : A massive 14 km bi-national tunnel is