| Window cleaners are at work on the 123-story Lotte World Tower, Korea's tallest building, in southern Seoul, Tuesday. The skyscraper has about 42,000 windows. After opening to the public in 2017, the building has its windows cleaned once a year. Korea Times photo by Shim Hyun-chul |
| Korea Times photo by Shim Hyun-chul |
| Korea Times photo by Shim Hyun-chul |
| Korea Times photo by Shim Hyun-chul |
| Korea Times photo by Shim Hyun-chul |