The flag-back fort was built in 1875 to keep the throat of Kaohsiung port. The whole flag-back fort can be roughly divided into three districts: the north is the drill field, the middle is the command area, and the south is the military house. In 1985 (74 years of the Republic of China) Taiwan Ministry of Interior announced as a second-level monument, 1991 (80 years of the Republic of China) Kaohsiung Municipal Government to repair, for three years, opened for visit on January 1, 1995. The fort is now repaired by Kaohsiung Municipal Government, and the font of the door is restored according to the ancient photos to restore the word "Tiannan" to save the truth of history. The thick gray and black walls represent more than 200 years of history. During the walk, watching the thick city walls, the solid fort, and the vicissitudes of color, can not help people drifting thinking to the long-term age. Main point: walk up and down the fort to see, let imagination drift back to the long-term age. There is a story hall to go in and learn about the history of that year. Tips: 1. Tickets: no 2. Location: On the mountain behind the flag of Qijin Peninsula 3. Transportation: Go out of the pier and go to the right hand side, you can see the road sign. Don't need tickets, you can stamp it. Follow the mountain trail first from the slow slope on the left side of the mountain, first visit the fort, then visit the Qijin lighthouse. After that, go down the mountain from the steps near the lighthouse. This route is not tired, the slope is not big when going up the mountain, otherwise the right side of the mountain is very steep, take your strength. 4. It is recommended to rent bicycles in Xiziwan MRT Station (50 cars, 100 normal cars, before 19:00, deposit documents). After visiting the flag fort and the flag lighthouse, then ride to the flagjin Peninsula. 5. The tour time of the Qihou Mountain where the flag back fort and the Qijin lighthouse are located is about 1-1.5, and the entire Qijin Peninsula browsing time takes more than half a day. 6. Under the flag back fort mountain, there are many souvenir shops on the streets of the Tianhou Palace, as well as many food stalls and cold drinks shops. There is also a big seafood market nearby, which can be processed and made. It is a good choice to ride the beach and eat some seafood!