El Arco is a marine dive site located in El Hierro, Canary Islands, characterised by a combination of reef, wall, and cave topography. Access to the site is by boat only. The site is suited for advanced divers due to the presence of strong currents and depths ranging from 11 to 40 metres. Visibility is generally high, reaching up to 30 metres. Divers should be aware of the deep nature of the site and the potential for strong currents. Local facilities include air fills, equipment rental, a dive shop, boat charter services, and a cafe.

El Puerto is a shore-entry reef site located in El Hierro, Canary Islands. The site is suitable for beginners, with an average depth of 6 metres. Divers can expect visibility ranging from 20 to 50 metres, with water temperatures fluctuating between 20C and 24C throughout the year. A typical dive at this location lasts approximately 40 minutes. Night diving is also available at this site. As a shallow reef environment, it provides a straightforward experience for those looking to explore the local underwater topography.

El Barco Chino is a dive site located in El Hierro, Canary Islands, featuring a combination of reef and wreck topography. The site is situated at an average depth of 11 metres, with recorded depths ranging between 11 and 12 metres. Access to this location is strictly by boat. Divers should be aware that conditions can vary, with visibility typically ranging from 10 to 30 metres. The site is subject to moderate currents, and strong currents are noted as a potential hazard. Due to these environmental factors, divers should exercise caution and ensure they are comfortable with current-prone conditions.

Baja Camellos is a marine dive site located off the coast of El Hierro in the Canary Islands. The site features a consistent depth of 12 metres. Conditions at this location vary, with water temperatures ranging from 20C in the cooler months to 24C during the late summer and autumn. Given the depth and nature of the site, it is suitable for divers with appropriate training for these conditions. Access to the site is typically via boat from nearby harbours. As a marine environment, the topography consists of volcanic rock formations characteristic of the region.

Roque la Mar is a reef and drop-off site located 500 metres off the coast of El Hierro. This site is suited for intermediate divers and requires boat access. The topography features a drop-off with depths ranging from 14 to 40 metres, averaging 25 metres. Divers can expect moderate currents and visibility typically between 15 and 30 metres. Water temperatures remain consistent throughout the year, ranging from 20C to 23C. Due to the depth and current conditions, this site is best suited for those with previous experience in open water environments.

El Desierto is a marine dive site located in El Hierro, Canary Islands, featuring a combination of reef, wall, and cave topography. The site is accessible only by boat and is suited for intermediate divers. Depths typically range from 10 to 25 metres, with an average depth of 20 metres. Divers should be aware that the site presents deep water hazards. Conditions are generally characterised by mild currents, and a typical dive duration is approximately 50 minutes. Water temperatures fluctuate between 20C and 24C throughout the year.

El Bajón is a submerged volcanic pinnacle located 555 metres off the coast of El Hierro. The site features a crater and walls that drop to significant depths, with the shallowest point reaching approximately 15 metres below the surface. Divers typically explore the upper section before descending along the walls, which reach depths of 50 metres. Due to the location, this site is subject to strong currents and requires advanced buoyancy control and technical proficiency. Access is strictly by boat, and dives typically last around 50 minutes. Visibility at the site ranges from 15 to 30 metres, though conditions vary depending on the strength of the current.

La Herradura is a reef and wall site located 300 metres off the coast of El Hierro. The wall structure begins at a depth of 8 metres and descends to 40 metres, with an average depth of 20 metres. Visibility ranges from 10 to 30 metres, allowing for clear navigation of the topography. Due to moderate to strong currents, this site requires boat access and is suited for intermediate divers. Water temperatures remain between 20 and 23 degrees Celsius throughout the year. Divers should be prepared for current conditions and manage their air consumption accordingly when exploring the deeper sections of the wall.