Visitors to the Changdeokgung Palace Pharmacy on the 17th are cooling off from the heat while enjoying herbal tea.. July 17, 2026. Senior Reporter Jeong Ji-yoon Jongmyo Shrine, Changdeokgung Palace, and the Royal Tombs of the Joseon Dynasty are open to the public for free until the 19th. I visited Changdeokgung Palace on the 17th, Constitution Day. I expected that there would not be many visitors due to the strong sunlight and sweltering heat, but the palace was crowded with more people than expected. Unlike Gyeongbokgung Palace, Changdeokgung Palace has lush trees everywhere...