Pentagonal Mart [...]

Meet the Pentagonal Mart, a gargantuan, $200 million shopping complex inspired by the US Pentagon, which has the dubious honor of being the largest vacant building in Shanghai. According to the People’s Daily News, the 70-acre mall was completed in 2009 and remains virtually empty to this day, “mainly because of its location and confusing inner structures.” Hmm, minor planning details. (Source)

picture of mart