After taking six years of construction, the 555-meter-tall (1,820 ft) Lotte World Tower opened in April, setting three world records.
The Lotte World Tower is the tallest tower in South Korea now followed by the Three IFC Office Tower, by nearly 300 meters and ranking fifth highest in the world.
It is also the highest glass-bottom observatory building at 478 meters (1,568 ft).
The Lotte World Tower has the world’s tallest and fastest double-decker elevator, the Sky Shuttle, which whisks passengers from the basement to the 121st-floor observation deck in one minute, or at 10 meters per second.
From the top of the half kilometer-tall tower, visitors can survey the edges of Seoul’s vast urban sprawl and the mountainous terrain beyond
One has to multiply 6 workers’ houses to get one Lotte World Tower.