The World’s Largest Atoll Once Called Truk Island! 4 Recommended Tourist Attractions in the Chuuk Islands

The Chuuk Islands belong to the Federated States of Micronesia and are located northeast of New Guinea. They are surrounded by the world’s largest atoll, spanning approximately 200 km in circumference. This atoll consists of 248 islands, both large and small. During World War I, the region became a Japanese territory and was known at the time as Truk Islands.

During World War II, Truk Island was heavily fortified as a key strategic base. Although it was never occupied until the end of the war, intense air raids led to the sinking of numerous ships, many of which still rest on the ocean floor today.

Now, the Chuuk Islands have transformed into one of the world’s most renowned diving destinations, attracting tourists and divers from around the globe. In this article, we introduce four must-visit attractions in the Chuuk Islands!

1. Jeep Island

A 30 to 40-minute boat ride from Moen Island, where the capital of Chuuk State, Weno, is located, brings you to the tiny Jeep Island. This island is only 110 meters in circumference, making it a true secluded paradise.

In 1997, Hiroshi Yoshida established cottages on this small island, which now serves as an annex of the Blue Lagoon Resort. Access is limited to Japanese visitors, and the island has only two cottages—one that accommodates eight guests and another for seven guests.

The surroundings consist of just a handful of trees, pristine white sand beaches, and the crystal-clear blue ocean! Visitors can enjoy diving with tropical marine life or simply relax on the beach, embracing the luxury of doing nothing. However, due to the island's small size, there are various rules and restrictions for visitors. While it may feel like heaven on earth, it’s important to be mindful and respectful of the environment and others.

2. Wreck Diving

The turquoise lagoon of this southern island is breathtakingly beautiful, but what sets Chuuk apart is its wreck diving experience. The Chuuk Lagoon is famous for its underwater shipwreck exploration, making it a must-visit destination for divers worldwide.

During World War II, Truk Island (as it was then called) served as a strategic naval base, with numerous warships and transport vessels stationed there. However, most of these ships were sunk by American air raids, turning the lagoon into one of the world’s most significant underwater museums. Today, these wrecks have become a highlight of Chuuk’s tourism scene.

One of the most renowned diving spots lies southeast of Dublon Island (formerly known as Summer Island), where several legendary shipwrecks are concentrated. Divers can explore iconic wrecks such as the Fujikawa Maru, Hokai Maru, Gosei Maru, and Rio de Janeiro Maru—all of which played crucial roles in wartime battles and transport missions.

Since wreck diving requires advanced diving skills, it is highly recommended to hire an experienced instructor guide for a safe and rewarding experience.

3. Japanese Lighthouse

Following World War I, the League of Nations placed Truk Island (now Chuuk) under Japanese rule, leading to the construction of naval bases, fortresses, and various military facilities. Many of these structures were abandoned after the war, and some have become difficult to access over time.

One of the most accessible historical landmarks in Chuuk is the Japanese Lighthouse, situated on a hill at the eastern tip of Moen Island. Built in the 1930s, this site preserves the lighthouse and artillery guns from the wartime era. Visitors can enter the lighthouse and enjoy panoramic views of Chuuk and the surrounding ocean.

However, the Japanese Lighthouse and its surrounding area are on private property, so visitors must pay an entrance fee to explore the site.

4. Nefo Cave

Located in the mountainous area inland from Weno’s city center, Nefo Cave is another historical site that was fortified by the Japanese military as a defense base. The cave measures approximately 3 meters in width, 2 meters in height, and extends 23 meters deep. During the war, many Japanese soldiers lived inside the cave, using it as a shelter.

At the entrance, a gun emplacement installed by the Japanese military still remains, giving the site a tense and eerie atmosphere. The inside of the cave is dimly lit, and knowing that supplies were cut off during the final days of the war, one can only imagine the immense hardships endured by those who took refuge here.

If you plan to visit this site, it is highly recommended to join a local guided tour for a safer and more informative experience.

◎ Summary

This article introduced four recommended tourist spots in the Chuuk Islands, part of the Federated States of Micronesia. Once known as Truk Island, Chuuk has deep historical ties to Japan and offers a wide range of attractions, from historical landmarks to world-class diving experiences.

For those interested in history tourism, visiting the remnants of pre-war Japanese rule is a fascinating way to explore the island’s past. Alternatively, divers can embark on wreck diving adventures, where sunken warships have transformed into vibrant underwater ecosystems.

For travelers flying to Chuuk International Airport in Weno, the most common route is via Guam. Whether you're drawn to history or the beauty of the sea, Chuuk promises an unforgettable experience!

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The World’s Largest Atoll Once Called Truk Island! 4 Recommended Tourist Attractions in the Chuuk Islands