Longdong #1 is a shore-entry reef and wall dive located on the northern coast of Taiwan. The site features a reef starting at 2 metres that transitions into a wall dropping to a maximum depth of 28 metres, with an average depth of 15 metres. Divers should be prepared for a rocky shore entry involving surf and surge, requiring thick-soled boots. Conditions vary, with visibility ranging from 5 to 30 metres and mild currents. Hazards include boat traffic, jellyfish, rip currents, sea urchins, and sharp coral. Facilities at the site include parking, toilets, showers, a dive shop, equipment rental, and rinse stations.

Long Dong 1.5 is a shallow shore-entry reef site located on the northeast coast of Taiwan. The site features depths ranging from the surface to 16 metres, making it suitable for beginners. Divers and snorkellers can explore the reef structure across the shallower sections. Conditions at the site are variable, and visitors should check local reports before entering. While the site is accessible year-round, the northeast monsoon can create large waves, making shore entry hazardous. Divers should be prepared for these conditions and ensure they are fully equipped before arrival, as on-site facilities are not confirmed.

Longdong #2 is a shore-entry reef and wall site located in Northern Taiwan. The topography features a shallow reef starting at 5 metres that transitions into a wall dropping to a maximum depth of 26 metres. Divers and snorkellers should be prepared for moderate currents and variable visibility ranging from 5 to 30 metres. Entry requires navigating a surf and shore break over sharp rocks and coral; timing is essential to avoid swell. Water temperatures fluctuate between 22 and 28 degrees Celsius throughout the year. On-site facilities include parking, toilets, showers, air fills, and a dive shop. Night diving is permitted at this location.

Longdong Bay #4 is a shore-entry reef and wall site in Northern Taiwan suitable for beginners and experienced divers. The site features depths ranging from 5 to 26 metres, with an average of 15 metres. Divers can encounter common wrasses, particularly between August and October. Less frequently, the site hosts zebra lionfish, chromodoris nudibranchs, pharaoh cuttlefish, snowflake morays, varicose wart slugs, snake eels, and pufferfish. Rare sightings include peacock mantis shrimp, Spanish dancers, harlequin shrimp, day octopuses, stonefish, and Indian lionfish. Conditions vary with visibility between 5 and 30 metres and mild currents. Hazards include boat traffic, entanglement, jellyfish, sharp coral, strong currents, and surf. Facilities include parking, toilets, showers, rinse stations, and nearby dive shops.

Steel Reef in Northern Taiwan is an artificial reef site suitable for beginners. Divers and snorkellers can access the site directly from the shore. The site features a shallow depth range of 2 to 10 metres, with an average depth of 6 metres. Conditions vary, with visibility typically ranging between 5 and 15 metres and mild currents. Hazards at this location include surf, sharp coral, and periods of low visibility. Facilities available at the site include parking, toilets, showers, and a rinse station. Night diving is permitted, and a typical dive lasts approximately 50 minutes.

Longdong 234 Channel is a shallow shore dive in Northern Taiwan, suitable for beginners. The site maintains an average depth of 5 metres. Divers can encounter a variety of marine life, including common wrasses, which are most frequently seen between August and October. Other species recorded at this site include the uncommon snowflake moray, zebra lionfish, chromodoris nudibranch, pharaoh cuttlefish, and eightband butterflyfish. Rarer sightings include the peacock mantis shrimp, Spanish dancer, harlequin shrimp, stonefish, Indian lionfish, day octopus, spotfin lionfish, and flamingo tongue. Water temperatures fluctuate throughout the year, ranging from 22C in the winter months to 29C during the peak of summer.

Longdong No. 1 Channel is a shore dive site located in Northern Taiwan. The site features a reef environment with an average depth of 6 metres. Divers should be aware of potential hazards including sharp coral and surge, which can affect conditions. The site is suitable for beginners, though conditions vary. A rinse station is available for post-dive equipment cleaning. Water temperatures range from 22C in the winter months to 29C during the summer. Due to the nature of the terrain, entry is via the shore.

Mosquito Hole is a shore-entry reef site located on the northern coast of Taiwan. The site features a reef structure ranging from 8 to 25 metres in depth, with an average depth of 18 metres. Divers and snorkellers should be prepared for moderate currents and variable visibility between 5 and 30 metres. Hazards include surf, sharp coral, and jellyfish. The site is suitable for intermediate divers, and night diving is available. Marine life observed at the site includes wrasses, snails, and various nudibranchs such as the Black-margined Nudibranch, Geometric Rainbow Dorid, Caramel Nudibranch, Triple-banded Split-tooth Dorid, and Varicose Wart Slug, alongside flatworms.