Police have discovered an impressive underground greenhouse for marijuana growing in Sofia. A 40-meter tunnel, measuring 45 to 45 centimeters, runs through a private property. Underground, the greenhouse has been connected to the water and electricity transmission system. The room was equipped with special lighting. More than 324 cannabis plants in pots were found in the greenhouse; a multi-shelf dryer that was left to drain cannabis heads, a number of bags of fertilizer and scales.