What are some tourist attractions in Shenzhen that not everyone knows about?

OCT Wetland Park is located at No. 8 East Baishi Road, Nanshan District, Shenzhen City, in the north plot of the Happy Coast Project. Covering an area of ??about 685,000 square meters, it has nearly 40,000 square meters of mangrove landscape and more than 100 species of rare birds. It is the breeding habitat for dozens of species of rare birds such as the black-faced spoonbill, a national second-level protected bird. It is known as China's only coastal mangrove wetland located in the hinterland of a modern metropolis.