Bomonsan Mountain Castle is an amazing castle located on the top of the mountain that is named after him and at an altitude of 406 meters above sea level. The castle was built in perfect harmony with nature, as the castle wall was built using square stones that were trimmed to match the natural stones distributed throughout the mountain, and the castle's colors match wonderfully with the neighboring charming forests. The castle was built 500 years ago, and dozens of successive civilizations have passed through it since.