The Roberto Ivens is a minesweeper wreck located 7400m off the coast of Cascais, Portugal. This advanced dive site sits at depths between 32m and 38m, with an average depth of 32m. Access is strictly by boat. Divers should be prepared for moderate currents and visibility ranging from 3m to 15m. The site presents hazards including its deep profile, potential for entanglement, and variable visibility. Water temperatures remain cool throughout the year, fluctuating between 15C and 17C. Species recorded around this area include common octopus, European common cuttlefish, gray seal, tricolor doris, wrasses, catshark, conger eel, slipper lobster, cratena slug, felimare fontandraui, scorpionfish, grey triggerfish, gurnard, and felimare villafranca.

Pedra dos Safios is a deep-water site located within the River Gurara Wreck Area, featuring a combination of natural reef and artificial structures. Divers typically encounter depths between 33 and 36 metres, with an average depth of 26 metres. The site is accessible by boat only, and conditions include mild currents and visibility ranging from 5 to 15 metres. Water temperatures remain between 15 and 17 degrees Celsius throughout the year, necessitating appropriate thermal protection. Due to the depth, this site is suited for intermediate divers who should maintain awareness of nitrogen narcosis and use a marker buoy to signal their presence to boat traffic.

Pedra do Avião is a deep reef site located 500 metres off the coast in the River Gurara Wreck Area. The site sits at depths between 30 and 42 metres, with an average depth of 38 metres. Divers must access the reef by boat. Conditions include moderate currents and visibility ranging from 10 to 30 metres. Due to the depth and current, this site is suited for intermediate divers. Water temperatures remain consistently cool, between 15 and 16 degrees Celsius, requiring appropriate thermal protection. Divers should maintain careful buoyancy to avoid sharp coral and rocks while monitoring bottom time closely.

Pedra da Malha is a shallow reef located near the River Gurara Wreck Area. Reaching a maximum depth of 13 metres, the site features a reef structure suitable for beginner divers. Conditions are generally manageable with mild currents, though visibility varies between dives. Water temperatures range from 15 to 18 degrees Celsius, requiring a wetsuit. Access is by boat only, and divers must remain vigilant regarding boat traffic; the use of a delayed surface marker buoy is essential upon ascent. Due to the presence of sharp rock edges across the reef, gloves are recommended where permitted by local regulations.

Pedra Da Lagoa is a marine dive site located in the River Gurara Wreck Area, Portugal. The site features a combination of reef and canyon topography, with depths typically ranging between 20 and 30 metres, averaging 24 metres. Divers can access the site by boat or from the shore, which is situated 500 metres away. Conditions are variable, with visibility between 5 and 15 metres and strong currents present. The water temperature remains between 15 and 17C throughout the year. Species recorded around this area include European Common Cuttlefish, Common Octopus, Mediterranean Moray, various wrasses, scorpionfish, and several species of sea slugs and flatworms.

Bailonas is a technical wall and drop-off site located at the River Gurara Wreck Area. The site features depths ranging from 40 to 55 metres, with an average depth of 40 metres. Divers must be prepared for strong currents that occur regardless of the season, alongside an overhead environment that requires advanced technical skills and precise gas management. Visibility is variable, fluctuating between 5 and 25 metres. Water temperatures remain consistent between 15 and 16 degrees Celsius throughout the year. Access to this site is strictly by boat, and divers should confirm conditions with a charter operator before planning a descent.

Praia da Poça is a shore-entry reef site in Cascais, Portugal, suitable for beginners and snorkellers. The site features a shallow reef with depths ranging from 2 to 8 metres, averaging 4 metres. Visibility typically spans 5 to 15 metres with mild currents. Water temperatures range from 15C to 19C, necessitating a wetsuit. Species recorded around this area include common octopus, European common cuttlefish, and various nudibranchs such as the tricolor doris. Facilities at the site include parking, toilets, showers, and a café. Divers should exercise caution as the reef structure contains sharp surfaces, and monitor depth closely due to the presence of deeper drop-offs in the vicinity.

Praia da Duquesa is a shallow reef site located in Cascais, Portugal, suitable for beginner divers. The site features depths ranging from 3 to 6 metres, with an average depth of 3 metres. Shore entry requires careful timing to navigate the surf, swell, and surge. Divers should wear thick-soled booties to protect against sea urchins and sharp rocks present on the seabed. Visibility varies significantly from 5 to 30 metres, and the site is accessible for night dives. Facilities available on-site include a dive shop, air fills, showers, parking, and first aid.