Zhenbei Tower, at the Jiankou Great Wall. Jiankou Great Wall to Beigou Village, 2022/10/23 Photos from a hike up to Zhenbei Tower at Jiankou, and then over the ‘Ox Horn’ and towards Mutianyu. Were you on this trip? How did you like it? We'd love to hear from you. • Send us feedback • Review it on TripAdvisor • Share this page on Facebook On a forest trail up to the Great Wall. Zhenbei Tower. Hiking on. On the way up the ‘Ox Horn’. Colours in the leaves by the Great Wall at Mutianyu. On the walk out to Beigou Village.