Yehyukang on the eastern coast of Lanyu features a combination of shallow reef, wall, and drop-off topography. The site reaches depths of 80 metres, though intermediate divers typically explore between 8 and 25 metres. Visibility ranges from 10 to 30 metres, with water temperatures between 24 and 27 degrees Celsius. Shore entry requires caution due to surge and swell, which can push divers onto sharp coral and rocks. Currents are moderate but can strengthen, so timing dives around slack water is recommended. Hazards include jellyfish, sea urchins, stonefish, and sharp coral. Species recorded around this area include sea kraits, regal angelfish, clown triggerfish, and various wrasses.

Yeyou Port is a shore dive site in Lanyu, Taiwan, featuring a combination of natural reef and artificial reef structures. The site is suitable for beginners, with an average depth of approximately 4 metres. Divers can expect mild currents and visibility ranging from 10 to 30 metres. Water temperatures remain warm throughout the year, fluctuating between 25C and 30C. Due to the presence of sharp coral and active boat traffic in the area, divers should exercise caution during entry and exit. Typical dives at this location last around 30 minutes.

Located off Lanyu, Taiwan, the Kaiyuan Port Garden Eel Area is a reef site ranging from the surface to 16 metres. Divers experience visibility between 30 and 50 metres, allowing for clear observation of the reef structure. Water temperatures remain between 25 and 30 degrees Celsius throughout the year. Access is via a shore entry, which requires caution due to surf, sharp coral, and rocks underfoot. The site is suitable for beginners, though the current can be strong and requires constant attention. Night diving is permitted at this location. On-site facilities include parking, toilets, showers, and a dive shop.

Wukungtung, or Five Caves, is a cavern and reef system on Lanyu suitable for advanced divers. The site features depths between 5 and 15 metres with an average of 12 metres. Divers can access the site from both shore and boat. Conditions include moderate currents and visibility ranging from 10 to 25 metres, though visibility can shift quickly within overhead sections. Due to the overhead environment, entanglement risks, and variable visibility, solid buoyancy control is required. Divers should carry two torches and run a guideline when entering cave passages. A local guide is strongly recommended for the first visit. Protective footwear is advised to avoid sharp rocks, coral, and sea urchins.

Yunvyan is a marine site off Lanyu featuring a combination of reef top, drop-off, and wall topography. Divers typically explore depths between 10 and 25 metres, with an average depth of 20 metres. Visibility ranges from 10 to 25 metres, and the site is subject to moderate currents that can shift along the wall face. Access is exclusively by boat, requiring coordination with local operators due to sea conditions. Divers should remain alert for boat traffic when surfacing and be aware of potential hazards including sharp coral, stonefish in sandy areas, and jellyfish in the water column.

Jade Maiden Rock is a reef and drop-off site located off Lanyu, Taiwan. The site reaches a maximum depth of 16 metres and is strictly for advanced divers due to persistent, strong currents that can shift direction without warning. Because of these challenging conditions, boat access is required and snorkelling is not an option. Divers should confirm visibility conditions locally before planning a dive. Water temperatures remain between 25 and 30 degrees Celsius throughout the year. The reef structure supports various marine life, including sea kraits, regal angelfish, clown triggerfish, Indian lionfish, and Chromodoris nudibranchs.

Kaiyuan Old Port is a shore-entry site in Lanyu, Taiwan, featuring a diverse topography of reefs, caves, and drop-offs. Located 300 metres from the shore, the site reaches depths between 13 and 34 metres, with an average depth of 15 metres. Divers and snorkellers can expect visibility ranging from 30 to 50 metres. Conditions are variable, with strong currents, surge, and potential boat traffic, making this site suitable for advanced divers. Facilities at the location include parking, toilets, showers, changing rooms, and a rinse station. Guided tours and boat charters are available through local dive shops.

Jichangwaijiao is a reef site located off the coast of Lanyu, Taiwan, offering diving from the surface to a depth of 30 metres. Access is exclusively by boat, and the site is known for strong currents that require careful planning around slack water. Water temperatures remain between 25 and 29 degrees Celsius throughout the year. Visibility is variable, and divers should remain aware of boat traffic when surfacing. Species recorded around this area include sea kraits, regal angelfish, clown triggerfish, nudibranchs, and various wrasses. Due to the challenging current conditions, this site is best suited for experienced divers who can manage variable underwater environments.