I visited this museum with my wife, who grew up in Seoul, and my teenage daughters. The main museum is a large but manageable single floor. The museum is worth a 1 to 2 hour visit. Seoul's history spans centuries so it is hard to cover everything. It includes how Seoul became the national capital and its evolution to what it is today. The Japanese occupation is prominently featured. I learned a lot, and it was helpful to have the audio guide even though in many cases the explanations consisted of summaries of the placards already posted. I was hopeful to see more of what happened to Seoul during the Korean War. There was very little included. In addition, while the rapid changes experienced since the war are covered, it would have been interesting to have more detail on how Seoul has evolved decade by decade. That said, Seoul's history is so long and action-packed that it would be impossible to cover everything.

Nice museum in Seoul with guided tours on Tuesday - Saturday starting at 11 am. Opens at 9 am and closes at 6 pm. Audio guides in English, Chinese, and Japanese. Free admission

I was pleasantly surprised at how fantastic this museum is. I hadn't seen much info on it from tourist guidebooks, so I wasn't sure what to expect. I learned so much about Seoul's history and how it developed over the many years it has existed. If you want to understand Seoul, you really should visit this museum early in your stay.