GYEONGJU, SOUTH KOREA - OCTOBER 31: A view of Observatory Cheomseongdae on October 31, 2025 in Gyeongju, South Korea. Observatory Cheomseongdae is the oldest existing astronomical observatory in Asia, Constructed during the reign of Queen Seon-deok AD 632-647, it was used for observing the stars in order to forecast the weather. Leaders and delegates from 21 APEC economies are gathering in South Korea for the upcoming APEC summit, where talks are expected to center on trade, supply chain stability, and technology cooperation. The meetings come amid heightened regional tensions and efforts to boost growth through closer economic integration, and as U.S. President Trump tours Asia on a six-day visit. (Photo by Chung Sung-Jun/Getty Images)