chongqing china

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Not your average “hole in the wall” 

Believe it or not, for residents of one building in China’s Chongqing municipality, that dull rumbling noise is actually a train. According to Guangming.cn, the train passes through the complex daily as part of its normal route. It is a feat that is all the more impressive given the mountainous terrain of the area.
 
Photos of the locomotive caused a stir online in China, with web users dubbing it “the most stunning Metro line ever.”