Sombrero is a challenging reef and wall site located in the Bat Islands, accessible only by boat. The topography features a wall structure suitable for advanced divers, with depths ranging from 9 to 35 metres and an average depth of 20 metres. Divers should be prepared for strong currents and variable visibility between 6 and 30 metres. Water temperatures typically range from 23 to 26 degrees Celsius, though intense thermoclines are common. Due to the depth, strong currents, and thermoclines, this site is intended for experienced divers. Air fills and dive shop facilities are available to support excursions to this remote location.

The Big Scare is a challenging reef and drift dive located in the Bat Islands, Costa Rica. This site is strictly for advanced divers due to strong currents and depths ranging from 20 to 30 metres. Divers must access the site by boat, as it is situated approximately 48 kilometres from shore. Visibility is highly variable, ranging from 3 to 30 metres, and intense thermoclines are common. Water temperatures fluctuate between 23C and 26C. Hazards include deep water, nitrogen narcosis, strong currents, and the presence of sharks. Species recorded around this area include King Angelfish, various moray eels, hawkfish, groupers, and wrasses.

Bat Islands in the Papagayo Gulf offers a challenging marine environment featuring both natural and artificial reefs. Divers can explore depths ranging from the surface down to 30 metres. Access to this site is strictly by boat due to the offshore location and prevailing conditions. The site is suited for intermediate divers, as it is subject to moderate currents and deep water. Visibility typically fluctuates between 10 and 30 metres, while water temperatures range from 23C to 26C throughout the year. The habitat supports a variety of marine life and invertebrates typical of the region. Divers should be aware of potential hazards including deep water, strong currents, and the presence of sharks.

Playa Bassey in the Bat Islands offers a combination of reef and artificial reef structures suitable for beginner snorkellers. The site features shallow depths ranging from 1 to 5 metres, with an average of 3 metres. Access is via a shore entry. Conditions are generally mild, though visitors should be aware of potential rip currents, sea urchins, and sharp coral in the area. Visibility typically fluctuates between 5 and 15 metres. Parking is available at the site for convenience. The location provides a straightforward environment for those looking to explore rocky beds and reef formations within the Papagayo Gulf.

Monkey Head Rock is a volcanic formation in the Papagayo Gulf that resembles a primate head. This boat-access site features a reef, drop-offs, and a pinnacle reaching depths of 30 metres. Conditions vary, with visibility ranging from 10 to 30 metres and mild currents, though divers should be aware of potential surge and deep water. The site is suitable for intermediate divers and offers excellent snorkelling around the base of the rock. Species recorded around this area include pufferfish. Water temperatures typically range between 24C and 26C throughout the year.

Playa Nacascolito is a reef site located 500 metres from the shore in the Papagayo Gulf. With an average depth of 5 metres and a maximum of 10 metres, this site is well-suited for beginners and offers a snorkel rating of 4 out of 5. Divers and snorkellers can expect mild currents and visibility ranging from 10 to 20 metres. Water temperatures remain warm throughout the year, between 27 and 29 degrees Celsius. Entry is possible via both boat and shore. Facilities available at the site include parking, toilets, showers, and a rinse station. Be aware that jellyfish may be present in the water.

Virador is a volcanic islet located near Monkey Head in the Papagayo Gulf. The site features a diverse topography including a reef, a pinnacle, and a cave system. Divers can explore a shallow cave located at 10 metres, with depths across the site ranging from 8 to 21 metres and an average of 18 metres. Access is by boat only. Conditions vary, with visibility typically between 10 and 25 metres and moderate currents. Water temperatures fluctuate significantly due to potential thermoclines, ranging from 18 to 28 degrees Celsius. Hazards at this site include jellyfish, sharks, and stonefish. The site is suitable for intermediate divers and offers a 4/5 rating for snorkelling.

Monkey Head is a distinctive pinnacle located 7000 metres from Playas del Coco. The site features a combination of reef, wall, and artificial reef structures, reaching depths between 1 and 25 metres with an average of 18 metres. Access is by boat only, and the site is suited for intermediate divers due to moderate currents and potential surge. Visibility ranges from 2 to 30 metres, and thermoclines are common throughout the year. Water temperatures remain between 24 and 27 degrees Celsius. Divers should be prepared for strong currents and surge conditions during their 50-minute dives.