Lotte World Tower (The observatory is on the 117th floor) elevator

Lotte World Tower is a 123-floor, 555-metre (1,821 ft) supertall skyscraper that is located in Seoul, South Korea. It opened to the public on April, 3rd 2017 and is currently the tallest building in the OECD, and is the 5th tallest building in the world.