Coron Island Cove is the third largest island in the Calamian Group of Islands in northern Palawan in the Philippines. The area around the wrecks have pleasant rock formations which provide for excellent snorkeling opportunities, with underwater visibility extending up to 80 feet (24 m). The water is often calm. Coron is one of the most visited destinations for wreck diving in the Philippines. Wreck dive sites are found in a depth as shallow as 10–30 feet and as deep as 120–140 feet. Most are in the range of about 60–80 feet, perfect for sports divers. Dive sites around Coron include many different reef dive sites and the famous "Günter´s Cave", also known as Cathedral Cave because during a certain time of the day, the sun throws a beam of light through a hole in the cave ceiling, illuminating the inside. It is possible to surface in the cave, as the hole in the cave-ceiling allows fresh air to enter.
The cave is named after Günther Bernert who was part of the first dive group to explore the cave, after hearing from local fishermen about its existence. Wreck diving sites in Coron Bay include the Irako wreck, Okikawa Maru wreck, Akitsushima wreck, Kogyo Maru wreck, Olympia Maru wreck, Kyokuzan Maru wreck, East Tangat gunboat wreck (the real name of the ship, Terukaze Maru, was recently discovered by a group of Dutch divers, who spent a couple of days digging into bottom sand around the stern), Nanshin Maru wreck, Lusong Gunboat Wreck, and Skeleton Wreck.
The aquatic views from the sunken Japanese ships off Coron Island are listed in Forbes Traveler Magazine’s top-10 best scuba diving sites in the world.