Plizio Visual Lab
Sihcao Green Tunnel
Sihcao Green Tunnel, located in the Annan District of Tainan City, is a unique natural ecosystem often referred to as 'Taiwan's Little Amazon'. It consists of a narrow water channel lined with dense mangrove forests whose canopies interlace over the water, creating a tunnel-like visual effect. The channel was originally part of a transportation route for salt during the Qing Dynasty and the Japanese colonial period. Today, it is a protected area within the Taijiang National Park and is home to several mangrove species, such as Avicennia marina and Bruguiera gymnorhiza. Visitors can take tours on traditional rafts to witness the rich biodiversity, including various species of crabs and migratory birds. The spirited reflection of the green foliage on the calm water surface creates a mystical atmosphere that is particularly popular with photographers. The area also serves as an important educational site for coastal conservation and wetland protection. Preserving this ecological gem is crucial for the environmental health of Tainan's coastal region.
- Location: Taiwan
- Top sights: Chengxi Wetland Landscape Area (Deer Ears Creek Old Estuary) · Bamboo green tunnel · Taiwan Alkali Dormitory (Tainan Cat Village)
- Nearby: Tainan (10 km)
Best time to visit & climate
The most pleasant time to visit is Jan, Feb, Dec.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 20 | 21 | 22 | 25 | 27 | 28 | 29 | 29 | 28 | 26 | 24 | 21 |
| Rain mm | 39 | 31 | 48 | 79 | 223 | 344 | 289 | 441 | 242 | 72 | 49 | 34 |
📋 Practical info
Geography
Facts
- The channel was once a vital trade route for salt transportation.
- It is home to four distinct species of mangrove trees.
- The tunnel is part of Taiwan's first wetland national park.
- Raft tours through the tunnel typically last about 30 minutes.
- The ecosystem supports more than 30 species of tidal crabs.
- Sihcao is located adjacent to the historic Dazhong Temple.
Explore nearby
Notable places around
Route planner — Car & Motorhome
Where do you start? We build the route here, with stops and country notes along the way.
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Sights in the town Sihcao Green Tunnel (5)
Sights nearby
Frequently asked questions
How long does a boat trip through the Grüner Tunnel von Sihcao take?
Do I need to wear a life vest?
When is the best time of day to visit?
Do I need insect repellent?
Is the place suitable for children?
Sihcao Green Tunnel: where is it located?
Sihcao Green Tunnel: what is there to see?
Sihcao Green Tunnel: when is the best time to visit?
Sihcao Green Tunnel: why is it worth visiting?






























