Photo: Mx. Granger, CC0 via Wikimedia Commons
It's a stretch to call this a mountain – it's really just a hill – but the view of the nearby neighborhoods from the top is nice, so it's worth a visit if you're in Gongming anyway. The pagoda on top is nice but not old (built in 2009). From the main (south) entrance the walk to the top takes ten minutes if that, but the steps are steep. From the north and east entrances there's a more leisurely set of trails that take you slowly up through the woods. Arrive via line 6 of the metro.
© OpenStreetMap contributors
依波钟表文化博物馆, Ebohr Horologe Culture Museum
Owned and operated by Ebohr, one of China's leading luxury watch manufacturers. Solo visitors and small groups (with less than 10 people) are required to make an appointment before visiting (this can be done either by phone or on WeChat). Visitation time is limited to 60-90 minutes and visitors are expected to follow the directions of their tour guide at all times.
石岩湖温泉度假村; Shíyánhú Wēnquán Dùjiàcūn
This has been a popular attraction since the 16th century when it was named as one of the "Eight Great Views of Xin'an County" (the county of which Hong Kong and Shenzhen were part). It's on a man-made reservoir at the back of Yangtai Mountain, and is not easy to get to but it is worth the trouble. Water springs from the ground at over 60 °C, but is cooled to about 40 °C before being fed into pools. There are public and private, indoor and outdoor pools.
深圳(宝安)劳务工博物馆, Shenzhen (Bao'an) Migrant Workers Museum
Tells the story of the hundreds of thousands of migrant workers who built Shenzhen and made it into the city it is today. The museum focuses on Bao'an district and celebrates the recent history of the city: Deng Xiaoping's "reform and opening up" and the subsequent fast-paced industrial development that has come to define Shenzhen. Fittingly, the museum itself is located in a former factory.
At the entrance to the museum complex, the first building preserves the look of part of the factory, but that's certainly not all there is to see here. Go up the ramp to the main exhibition hall, which is full of artifacts from the recent history of industrial Shenzhen, including lots of personal items donated by factory workers to give you a window into their lives—love letters, dorm room decorations, and so on. Most of the labels are bilingual in Chinese and English. The second floor, accessible by a staircase around the right side of the building, has a display of lots of beautiful Chinese calligraphy.
凤凰山, Fènghuáng Shān
Literally "Phoenix Mountain", this forested mountain in northwestern Shenzhen is covered with a network of well-maintained hiking trails paved with steps. The main point of interest is Fengyan Temple (凤岩古庙, Fèngyán Gǔmiào), a Buddhist temple partway up the mountain, dating back to the Yuan Dynasty. At the trailhead (凤凰山脚) there are various shops selling food and drinks, including bottled water, which you should definitely buy for the hike if you didn't bring any. Then plan to hike 30–40 minutes (all uphill) to get to the temple complex. The complex has lots of interesting spots scattered around, including fortune tellers, lots of shrines, and a big pool full of turtles and a few lazy fish, surrounded by people pestering them by throwing coins. There are lots of shops selling food, incense, jewelry, and other traditional items for the many pilgrims who make their way up to pray and leave offerings. For more serious hikers, the trails continue higher up on the mountain past the temple. A partial map of the trails can be found at the temple complex, though it's only in Chinese. The trail up to the temple is crowded, especially on weekends, but the trails higher up on the mountain aren't so bad.
Both the temple and the rest of the mountain have views of the surrounding area. Don't miss the two-story lookout tower (望海楼, Wang Hai Lou) in the temple complex. The views make for an incredible contrast between the traditional temple in the middle of the woods and the unending high-rises down below. From the right spot you can make out ships floating in the Pearl River.
The temple complex also has a vegetarian buffet restaurant, Fenghuang Mountain Vegetarian Restaurant (凤凰山素菜馆). This is not the little place with the signs saying "Vegetarian Restaurant" in English (though the food there isn't bad either)—the buffet is located at the other end of the complex; look for signs that say "素菜馆 Su Cai Guan". The buffet costs ¥28 for breakfast, ¥58 for lunch—pay before you enter, at the Ticket Counter outside. If you want to skip the hike, the restaurant (and therefore the temple complex) are also accessible by road.
华夏军装博物馆
Displays a wide variety of military uniforms from ancient times to the early 21st century.
海上田园 Hǎishàngtiányuán
A much-hyped 1.6 square kilometer park by the water, way on the outskirts of the city, full of trees, streams, ponds, and walking paths. The activities scattered around are fun, including obstacle courses, boats, strawberry picking, and a lookout tower. If you like hills this is not the park for you, but it allows for a nice few hours walking around and exploring whatever attractions you stumble across. For travelers who are a bit adventurous, the highlight is surely the obstacle courses, some of which go over water and will get your heart racing. This park is connected to the metro network via 2 line 12 stations, Waterland Resorts East (terminus of line 12) and Waterland Resorts South.