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[00:00.39] The fifth-tallest building in the world, the Lotte World Tower, has opened in Seoul, South Korea.

[00:11.55] The event was celebrated in a ceremony with a fireworks display that lit up the building and the sky.

[00:23.50] The 123-story glass and steel structure is South Korea’s tallest building.

[00:33.07] It rises 555 meters above the Seoul skyline.

[00:41.03] The tower features the world’s highest floor made of glass.

[00:47.14] From this observation area, visitors can look straight down to the busy traffic about one-half kilometer below.

[00:58.83] The building also has the highest swimming pool in the world, as well as the world’s fastest elevator.

[01:10.52] The elevator can reportedly take passengers to the top of the building in just one minute.

[01:19.02] The Lotte World Tower houses offices, personal residences and a seven-star hotel.

[01:29.11] The top 10 floors are used for public events and entertainment, including the observation deck and a rooftop restaurant.

[01:41.60] Attached is a large complex with a shopping mall, aquarium, movie theater, music hall and amusement park.

[01:54.08] The launch came during a troubled time for the Lotte Group, which is known for its international chain of supermarkets.

[02:05.77] The group’s chairman and some of his family members recently went on trial for fraud and other charges.

[02:15.86] Lotte has also faced problems in China, where the government reportedly retaliated against it for providing land in South Korea for the U.S.-built THAAD anti-missile system.

[02:34.43] The building was designed by American architecture company Kohn Pedersen Fox (KPF).

[02:44.79] It cost about $3.6 billion to build.

[02:50.90] The company said the design combines “a modern aesthetic with forms inspired by the historic Korean arts of ceramics, porcelain and calligraphy.”

[03:07.64] KPF also designed the building that used to be South Korea’s tallest building - Northeast Asia Trade Tower – which opened in the city of Incheon in 2014.

[03:21.45] Below is a list of the top 10 tallest buildings in the world.