Plizio Visual Lab
Laomei Green Reef
Laomei Green Reef is located on the northern coast of Taiwan in Shimen District and represents a rare geomorphological phenomenon. The reef is composed of volcanic rock, specifically andesite, originated from the Tatun Volcanic Group eruptions and subsequently carved by marine erosion into parallel trenches and ridges. Every year between March and May, the stone structures are covered by lively green algae (Ulva and Enteromorpha species), transforming the shoreline into a spectacular emerald carpet. This phenomenon is strictly seasonal, as the algae perish under the intense summer sun. The reef extends for about 2 kilometers and provides a unique case study of the interaction between volcanic substrates and marine biology. To protect the fragile ecosystem, walking on the algae-covered reefs is strictly prohibited for visitors. It has become a premier destination for nature photographers seeking the first-rate balance of green stone and crashing waves.
- Location: Taiwan
- Top sights: Shimenshan · Northernmost point of Taiwan · Alilaoshan
- Nearby: Zhongjiao (10 km)
Best time to visit & climate
The most pleasant time to visit is Apr, Nov, Dec.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 16 | 16 | 18 | 21 | 25 | 27 | 29 | 29 | 27 | 25 | 22 | 18 |
| Rain mm | 97 | 92 | 136 | 133 | 215 | 238 | 162 | 254 | 235 | 102 | 104 | 94 |
📋 Practical info
Geography
Facts
- The reef structure extends for approximately 2 kilometers
- The green algae phenomenon occurs only from March to May
- The base rock is volcanic andesite from the Tatun eruptions
- Primary algae species include Ulva lactuca (sea lettuce)
- The parallel trenches are formed by differential marine erosion
- Walking on the reefs is strictly prohibited to preserve the algae
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.
© OpenStreetMap contributors · OpenRouteService
Sights in the town Laomei Green Reef (6)
Sights nearby
Frequently asked questions
When is the best time to see the Green Reef?
Is walking on the reef allowed?
Is there parking nearby?
What is the best time of day for photos?
Are there sanitary facilities?
Laomei Green Reef: where is it located?
Laomei Green Reef: what is there to see?
Laomei Green Reef: when is the best time to visit?
Laomei Green Reef: why is it worth visiting?































