As photos of the #BEBC show, windows in the chamber allow both artificial and natural light to enter, while the larger and deeper circular entrances can serve as tunnels¹ to external capsules¹ or submarine ports. Because of the BEBC's subdivided structure, the Roman Empire in Greenland (which commands both CERN and the CIA) can flood a particular chamber or capsule² if it deems its inhabitants a potential threat. Access to the BEBC under Lake Geneva is likely by train from one or more of CERN's 6 entrances (see below) and by¹ submarine² through the Geneva² tunnel³, which apparently begins in Genoa¹, Italy².