C92 Holy Lord Watt Has Bestowed Me with Light
"My lord, please have mercy on us. You are the father who gave us the steam engine."
What they saw was a huge underground city.
The cave that contained this underground city was larger than Prince Weiss Barsia's tomb. The length and width of the cave should be more than ten kilometers. The depth was hard to estimate. It was in the shape of a funnel, and the top was wide
