Lotte World Tower (Korean: 롯데월드 타워), formerly known as the Lotte World Premium Tower, is a 123-floor, 556 metres (1,824 ft) supertall skyscraper currently under construction in the second-generation Lotte World complex in Seoul, South Korea. Upon completion in 2015, it is expected to become the tallest skyscraper in the OECD, surpassing One World Trade Center in New York City and housing the tallest observation deck in the world on its 123rd-floor at 497.6 metres (1,633 ft). #Lotte_World_Premium_Tower #Lotte_World_Tower #Seoul #Seoul_Lotte_Tower #Skyscraper #South_Korea #Supertall
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