The N Seoul Tower, officially the YTN Seoul Tower and commonly known as the Namsan Tower or Seoul Tower, is a communication and observation tower located on Namsan Mountain in central Seoul, South Korea. At 236m, it marks the highest point in Seoul.Built in 1971, the N Seoul Tower is Korea's first general radio wave tower, providing TV and radio broadcasting in Seoul. Currently, the tower broadcasts signals for Korean media outlets, such as KBS, MBC and SBS.HistoryBuilt in 1969, and at a cost of approximately 2.5 million USD, the tower was opened to the public in 1980. Seoul Tower was completed on December 3, 1971, designed by architects at Jangjongryul though at the time the facility interior was not furnished. It took until August 1975, for the third floor of the observatory deck, museum, open hall, souvenir shop, in addition to bring the other facilities to completion. However, despite finalization of tower construction, the observatory was closed to the public until October 15, 1980. Since then, the tower has been a landmark of Seoul. Tower elevation ranges from 236.7m at the base to 479.7m above sea level. Seoul Tower had its name changed to N Seoul Tower in 2005 whereas the "N" stands for 'new', 'Namsan', and 'nature.' Approximately 15 billion KRW was spent in renovating and remodeling the tower.When N Seoul Tower's original owner merged with CJ Corporation, it was renamed the N Seoul Tower (official name CJ Seoul Tower). It has also been known as the Namsan Tower or Seoul Tower. It is also Korea's first general radio wave tower that holds transmissions antennas of KBS, MBC, SBS TV, FM, PBC, TBS, CBS, and BBS FM. Seoul Tower chosen to worldwide travel expert evaluation and reader preferences is registered the world's 500 attractions in research.