In October 2019, K-Challenge planned, organized, and delegated a high-level visit by the Estonian Waste Management delegation to Seoul, South Korea. The large delegation included experts from the Estonian Circular Economy Industries Association, representatives from local governments, Estonian landfill and recycling companies, as well as the Tallinn Waste Recycling Center. High-level meetings in Seoul included discussions with the Seoul Metropolitan Government, the Gangnam Resource Recovery Facility and with representatives from the Seoul Upcycling Plaza. Additionally, the visit included excursions to local landfill sites.