Valley of the Tubes is a reef site in the Thousand Islands, Indonesia, characterised by a high concentration of tube corals. The site features coral formations starting at a depth of 5 metres. Divers should note that the western section of the reef shows signs of silt and human-related damage, with better coral conditions found towards the east. Access is via a shore entry. Conditions include moderate currents and visibility ranging from 5 to 15 metres. Due to the presence of sharp coral, surf, and variable visibility, this site is recommended for intermediate divers.

Sepa Island in the Thousand Islands offers a straightforward reef dive suitable for beginners. The site features depths ranging from 12 to 18 metres, with an average depth of 15 metres. Divers can expect mild currents and visibility between 5 and 10 metres. The water temperature remains consistently warm, between 29 and 30 degrees Celsius throughout the year, allowing for comfortable diving without thick exposure suits. Access to this site is by boat only. Due to varying conditions and operator schedules, it is recommended to check locally for the most current boat departure times and available facilities before planning a trip.

The Papatheo Shipwreck is a wreck and reef site located off the outer reef of Papatheo Island. The vessel lies on a slope, with the bow resting at a depth of 10 to 12 metres and the stern reaching 28 to 30 metres depending on the tide. Divers access the site by boat, encountering moderate currents and visibility ranging from 1 to 10 metres. The site is suited for intermediate divers due to the depth and current conditions. Hazards include boat traffic, currents, and depth. After exploring the wreck structure, divers can observe the surrounding coral reef.

Kaliage Kecil Utara is a reef site in the Thousand Islands, Indonesia, characterised by its drift diving conditions. The topography features a valley where visibility can drop due to high turbidity at depths between 5 and 25 metres. Divers should be prepared for strong currents that occur between tides. The site is accessible via shore entry and is suitable for intermediate divers. While the reef is noted for its conservation status and rich coral growth, species recorded around this area include wrasses, butterflyfish, anemonefish, and various invertebrates such as nudibranchs and clams. Night diving is available at this location, and guided tours are provided by local dive shops.

Pulau Putri in the Thousand Islands offers a shallow reef and artificial reef environment suitable for beginners. Divers and snorkellers can explore depths ranging from 3 to 7 metres, with an average depth of 5 metres. The site features mild currents and visibility between 5 and 20 metres. Water temperatures remain consistent throughout the year, typically between 29 and 30 degrees Celsius. Entry is via the shore, and the site supports night diving. Species recorded around this area include various wrasses, anemonefish, butterflyfish, groupers, and sea stars. Hazards to be aware of include lionfish and sea urchins. Facilities include a dive shop, equipment rental, and guided tours.

Mia Point in the Thousand Islands offers a varied underwater landscape featuring both natural reef formations and artificial reef structures. This boat-access site reaches depths between 14 and 20 metres, making it suitable for intermediate divers. Visibility typically ranges from 5 to 10 metres. While currents are generally mild, they can strengthen, requiring divers to monitor their position throughout the dive. Water temperatures remain warm, consistently between 29 and 30 degrees Celsius. Due to active boat traffic in the area, divers should deploy a surface marker buoy before ascending and remain vigilant during safety stops.

Kayuangin Lagoon is a marine dive site located in the Thousand Islands, Indonesia. Access to the water is via a shore entry. Divers should be aware that this site is subject to strong currents, which requires an intermediate skill level. Due to the nature of the location, boat traffic is a noted hazard for divers in the area. Water temperatures remain consistent throughout the year, ranging between 29C and 30C. As there is no specific data regarding marine life at this location, divers should focus on the physical conditions and navigation of the lagoon environment.

Coral Garden in the Thousand Islands is a reef and artificial reef site suitable for beginners. Divers and snorkellers can explore the area via shore entry, with depths typically ranging from 10 to 15 metres and an average depth of 10 metres. Conditions are generally mild with visibility between 10 and 30 metres. The site features coral nurseries and a house reef environment. Water temperatures remain consistent throughout the year, between 29 and 30 degrees Celsius. Facilities available at the location include equipment rental, a cafe, and guided tours. Be aware of sea urchins and stonefish when navigating the reef.