I found a mysterious octagonal pagoda erected at a river band in Tan Shan River, New Territory. The first visit was in July, a typhoon signal #8 so I couldn't do a good observation. Then I paid a second visit in Aug. I climb to the top and did a details measurement of the pagoda. I talked to some villagers and someone who worked in the Government but none of them able to confirm what was it.
However, I have saw some similar structures in foreign countries and Mainland China. Subjectively I believe it was a tower which wrapped by drapery therefore no text or totem on the surface.
I have an article and video on my website (in Chinese). Take a look and share your though~~