Gyeongbokgung Palace is one of the most iconic and historically significant landmarks in Seoul. It was built in 1395 and served as the main palace during the Joseon Dynasty. Visitors can admire the grand architecture of the palace and learn about the history of Korea through the various exhibits and artifacts displayed on the palace grounds. One of the main attractions is the Royal Guard Changing Ceremony, which occurs multiple times a day and showcases traditional costumes and performances. It's also popular to rent a hanbok (traditional Korean clothing) and take photos while walking around the palace grounds, which offer stunning views of the surrounding mountains and cityscape.