Introduction to the Twenty-Four Eyes Tower: The Twenty-four Eyes Tower is located at the commanding heights of the Panlongshan Great Wall. It is where Qi Jiguang once worked and is also the last watchtower on the east side of the Panlongshan Great Wall. The building has three floors. There are three arrow windows around the first and second floors. The top floor is surrounded by crenels and 24 lookout holes. It is a rare treasure in the history of Great Wall architecture. Now only one wall remains, with brackets inside to keep it standing.