The Siaes Tunnel is another extraordinary dive site on Palau, this site is situated close to Ulong Channel on the west coast. Due to its depth, it is considered an advanced dive site and time inside is therefore limited around 12 minutes.

The opening to the tunnel starts on a sheer wall at 23m and stretches inside for 50m, with a height of 6m and a width of 16m. The inside is an enormous cavern ranging in depth from 30-40m. White tip sharks can often been seen resting at the bottom.

• Dive Type: Boat Dive
• Diver Level: Advanced Open Water Diver
• Max Depth: 40m

This site is situated on the west coast of Palau, close to Siaes Tunnel. The entrance is covered with coral gardens and the channel itself stretches some 500m - at an average width of 33m - to the lagoon. There is a sandy bottom at the entrance where shark gather together to feed on the fish that are swept inside.
The bottom varies in depth from between 10-15m and is clear of coral, but the sides are festooned with soft coral and sea fans. Divers will be able to see a vast array of plate coral that houses squirrelfish, glasseyes and soldier fish.

• Dive Type: Boat Dive
• Diver Level: Open Water Diver
• Max Depth: 15m

The blue hole is a fascinating site. From the shallow reef, divers can enter from any of four openings and descend into an enormous underwater cavern. When the light is right, the feeling inside is of being in a submerged cathedral.

The bottom drops to 35m and divers will discover a good variety of sea fans and whip and cup corals. The fish life is also diverse and larger pelagics, including barracuda, tuna and jacks can be encountered along with grey and white tip reef sharks.

• Dive Type: Boat Dive
• Diver Level: Advanced Open Water Diver
• Max Depth: 35m

The Blue Corner is one of the most famous dive sites around Palau and it’s also the one that everyone wants to visit. Depths and currents here can change in seconds, therefore at times this dive site will not make it suitable for beginners. Divers can expect to encounter plenty of white tip and grey reef sharks, barracuda, jacks, rays, tuna, snapper, wrasse and bass. A myriad of smaller reef fish inhabit the area as well.

• Dive Type: Boat Dive
• Diver Level: Advanced Open Water Diver
• Max Depth: 30m

This site is located near Anguar Island at the most southerly part of Palau. At its shallowest, this reef lies in 10m of water, with walls that drop off steeply to the depths. Because of the ever-present currents, there is actually very little coral life at the top; however the walls are covered in sea fans, sea whips and hard and soft corals. Fish life is profuse here and it is a great site to see grey reef sharks.

• Dive Type: Boat Dive
• Diver Level: Advanced Open Water Diver
• Max Depth: 45m

This is a man-made channel that was blasted out by German miners, in the early 1900s. There is a sandy bottom at 17m that slopes away steeply to the depths. The bottom has some large coral formations. The biggest attraction here is the large number of manta rays divers are likely to see. Grey reef sharks are also often encountered, again taking advantage of the cleaning wrasse. Other attractions are barracuda, lionfish, snappers and triggerfish.

• Dive Type: Boat Dive
• Diver Level: Open Water Diver
• Max Depth: 17m

The Iro Wreck is located at Urukthapel Bay and is perhaps the best-known and most popular shipwreck in Palau.

It is located just a short distance from Koror and is in an area that is normally protected from winds and roughs seas. It is basically shallow as wrecks go and is beautifully overgrown with many forms of sessile marine life. Its sister ship, the Sata lies close by, upside-down, deep, and basically not divable.

• Dive Type: Boat Dive
• Diver Level: Advanced Open Water Diver
• Max Depth: 30m

Located at Malakal Harbor, the Helmet Wreck is a sunken World War II Japanese Ship is the latest discovery in Palau. The ship has been untouched and unseen by humans since the war. The ship sits on a sloping bank with the stern in 50 feet of water and the bow in about 100 feet. It is a new ship, as an inspection of its engine room shows a triple expansion, single shaft steam engine. The ship may not have been in use at the time it went down and may not even be Japanese built, but rather a captured vessel.

• Dive Type: Boat Dive
• Diver Level: Advanced Open Water Diver
• Max Depth: 25m

Shark City reef consists of sheer vertical walls, moderate slopes and canyons. Many Gray Reef Sharks, schools of barracuda, snappers and Unicorn fish patrol the walls and corners of the reef. The plateau and the upper walls host large schools of silver barracuda and snappers. Spotted Eagle Rays and Napoleon Wrasse are often seen here as well. Large patches of healthy lettuce corals can be found on top of the plateau. The canyon, encountered on the South to North dive is rich with marine life. In recent years the canyon has been nicknamed Hammerhead Point due to numerous encounters with Great Hammerheads.

• Dive Type: Boat Dive
• Diver Level: Open Water Diver
• Max Depth: 40

West coast of Palau. Above Siaes Tunnel and Ulong Channel

• Dive Type: Boat Dive
• Diver Level: Open Water Diver
• Max Depth: 30m