when he knocked down the wall in his basement he found a hidden room it led to a maze of tunnels stretching hundreds of feet underground he had accidentally discovered an ancient city built thousands of years ago at 18 stories deep it was big enough to house up to 20,000 people inside archaeologist found schools stables and Wine sellers it also had ventilation shafts secret doors and even Escape Routes that's because it was used used as a refuge from war and invasions and after remaining unknown for thousands of years it's now a well-known tourist attraction