If history is your thing, military or otherwise, then you’ll want to take a slow walk through Seoul’s War Memorial Museum of Korea. There is an amazing amount of information on Korea from Joseon times up to today They have life size turtle ships, beautiful displays, dedications, etc… There is, of course, a lot dedicated to the Japanese Colonialism and the Korean War and beautiful appreciation is given to the countries who were involved in helping Korea during those times.
As so many wonderful museums in Korea, the entrance is free. Establishing free entertainment and education is one of the many things I love best about Korea. This is a great place to go during the rainy monsoon month that is coming upon us!