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East Rennell (Lake Tengano)
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Lake Tengano (or Te Nggano) on Rennell Island is the largest landlocked body of water in the South Pacific and the focal point of the East Rennell UNESCO World Heritage site. Originally the lagoon of an ancient atoll, the lake was cut off from the sea by tectonic uplift, creating a unique brackish ecosystem. It stretches approximately 15 kilometers in length and is bordered by rugged limestone cliffs and dense, pristine rainforest. The lake is home to numerous endemic species, most notably the Rennell water snake, which is found nowhere else on Earth. For the local people, the lake is a vital source of livelihood and a sacred landscape deeply embedded in their cultural mythology. During World War II, it served as a strategic base for US Navy PBY Catalina flying boats, and submerged wreckage can still be found in its shallow reaches. East Rennell was the first natural site in the Pacific to be inscribed on the World Heritage List, highlighting the global ecological importance of this remote natural wonder.
- Location: Solomon Islands
- Nearby: Rennell Island (34 km)
📋 Practical info
Visiting
East Rennell is a UNESCO World Heritage site and can be visited, but access is difficult due to its remote location. Lake Tengano is the centerpiece and is typically explored by boat.
Typical hours
There are no fixed opening hours as the area is freely accessible. The best time to visit is during the dry season from May to October when trails are passable.
Photography
Photography is allowed everywhere, but drones may require a permit. The view of the lake from the boat features great panoramic shots.
Time needed
A visit to the lake and surrounding forests typically takes a full day. If you want to explore remote bays, plan for two days.
Combine with
East Rennell is on Rennell Island and can be combined with visiting the island's traditional villages. The nearby TāKūn caves are also worth seeing.
Getting there
Access is by domestic flight from Honiara to Rennell, then by boat across the lake. It is advisable to book a guided tour as logistics are complex.
Insider tip
Bring plenty of drinking water and mosquito repellent, as there are no facilities on site. Start early in the morning to avoid heat and high humidity.
Geography
Facts
- The lake covers about 20% of the total land area of Rennell Island.
- East Rennell was inscribed as a UNESCO World Heritage site in 1998.
- The lake's water is brackish, a unique mix of fresh and salt water.
- There are approximately 200 small coral islets located within the lake.
- The Rennell water snake (Laticauda crockeri) is endemic to the lake.
- US Catalina flying boats utilized the lake as a base during WWII.
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Notable places around
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Sights nearby
Frequently asked questions
How do I get to Lake Tengano?
You must fly to the remote island of Rennell and then book a guided hike.
Is the water in the lake suitable for swimming?
Yes, the water is clear and warm, but inquire locally about current conditions.
Best time to visit Lake Tengano?
The dry season between May and October is good for hiking and visits.
Do I need a permit?
Yes, visiting the UNESCO World Heritage site often requires permission from local tribal leaders.
Is there accommodation there?
There are very simple, mostly private guest houses in the villages by the lake.
East Rennell (Lake Tengano): where is it located?
East Rennell (Lake Tengano) is located in Solomon Islands.
East Rennell (Lake Tengano): why is it worth visiting?
Lake Tengano (or Te Nggano) on Rennell Island is the largest landlocked body of water in the South Pacific and the focal point of the East Rennell UNESCO World Heritage site.
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