Lotte Mart
The Lotte World Mall was finally opened in October 2014, with Avenue L, Lotte Mart, and Hi-Mart opening on October 14 and Lotte Cinema, Lotte Duty-Free Shop, and Lotte World Aquarium opening on October 15. In December, the Lotte World Mall's cinema and aquarium were closed due to screen vibrations and a tank leak, respectively. Both reopened after five months with the approval of the Seoul Metropolitan Government. A workplace accident delayed the construction of the Lotte World Mall's concert hall, which eventually opened on August 18, 2016. On December 22, 2016, construction of the Lotte World Tower finished, with a ceremony being held to commemorate the occasion. The Lotte World Tower officially opened on April 3, 2017.