(Source: Yangmingshan National Park Headquarters and Taipei City Government)

Siaoyoukeng is a scenic area of post-volcanic geology located in the northwest area of Cising Mountain. Visitors can get to the scenic trail by turning right from the Siaoguanyin Stop on Yangjin Highway. It is 805 m above sea level and famous for its the fumaroles, sulfur crystals, hot springs and splendid caved-in landforms formed by post-volcanic activity.

In addition to Siaoyoukeng, from the observation platforms in the area, visitors can look over various extinct conical volcanoes in the vicinity, including Jhuzih Mountain, Datun Mountain, Cising Mountain and Siaoguanyin Mountain, and also the Jinshan Coast.

Jhuzihhu, located between Datun Mountain and Cising Mountain, was originally a dammed lake. Water was drained after cutting through the lake basin. It became the terraces as we see today after the cultivation of early settlers.

Plant-loving visitors can visit the Arrow Bamboo Forest Trail nearby to observe the arrow bamboo forest, the silvergrass meadow, and other volcanic plants.

Visitors can climb Cising Mountain from the entrance next to the Siaoyoukeng parking lot. It takes about 1 hour to reach the top (1,120m elevation), and is the highest peak in Taipei City. Visitors can take the east peak to descend the mountain to Lengshueikeng via Cising Park and Menghuan Pond and look over Shamao Mountain and Taipei City. Visitors can also visit the nursery, visitor center before reaching the Route 260 bus terminus on Yangmingshan.

Opening hours: 9:00am-4:30pm. Closed on Mondays (or Tuesdays if Monday is a holiday)
Tel:(02)2861-7024; Snack shop: 2861-8059
Address:69, Zhuzihu Rd., Beitou District, Taipei City 11292

Services:

1. Guide appointments
2. Recreation information enquiries
3. Explanations and displays of volcanic geology, hot springs and fumarole formations, and animal and plant ecology, models and pictures.
4. Free movie appreciations:
   Mornings: 9:00am, 10:00am, and 11:00am
   Afternoons: 2:00pm, 3:00pm, and 4:00pm
   Movies: "Eagles of Caoshan," "The Formosan Blue Magpie," and "Insects of Taiwan." To be broadcast flexibly according to the size of the crowds.
5. Sales of explanatory publications, souvenirs, foods, and beverages (outsourced operations).

Notice for visitors:

1. The ground around sulfur fumaroles and geothermal hot spring areas is loose. Please do not climb over fences in order to avoid accidents.
2. The weather in the area changes frequently. Please prepare raingear and warm clothes before climbing and hiking.
3. Digging, climbing, and cutting trees, picking flowers, and herbs, or carrying out of other natural resources from the park area is strictly prohibited.
4. Littering, shouting, listening to music, fireworks, and barbecues are not allowed.