Great Wall of China

Simatai, a section of the Great Wall of China located in the north of Miyun County, 120 km northeast of Beijing, holds the access to Gubeikou, a strategic pass in the eastern part of the Great Wall. Originally built during the Northern Qi dynasty (550–577) and rebuilt in the Hongwu years of the Ming dynasty by Qi Jiguang, this section of Great Wall is one of the few to retain the original features of the Ming dynasty Great Wall.

Simatai Great Wall is 5.4 km long with 35 beacon towers. This section of the Great Wall incorporated the different characteristics of each section of the Great Wall. A specialist on the Great Wall, Professor Luo Zhewen, has said "The Great Wall is the best of the Chinese buildings, and Simatai is the best of the Great Wall." UNESCO has designated Simatai Great Wall as one of the World Cultural Heritage sites.

Hanging precariously onto the Yanshan Mountain, Simatai Great Wall is known for its steepness.

Simatai Great Wall is separated by a valley into eastern and western parts. The western part appears gentle with 20 well-preserved watchtowers dotting along the wall. The eastern part is much steeper, following more rugged terrain that includes cliff edges and kilometre-high peaks. The 15 watchtowers are relatively closely spaced and provide spectacular views. Main attractions in the eastern part include Watching Beijing Tower, Fairy Tower, Heavenly Ladder and Sky Bridge, though they are currently closed to the public for safety reasons.