La Reina is a small rock island that is a reliable spot for seeing giant Pacific manta rays, which come to be cleaned. The site also features a small shipwreck and a beautiful, healthy coral reef.

The waters off La Restinga on El Hierro are a protected marine reserve and offer some of the best diving in the Canary Islands. The dramatic volcanic underwater landscape is teeming with a huge diversity of fish, including rays, groupers, and barracuda.

The La Revellata peninsula in Corsica offers spectacular wall and canyon diving. The dramatic drop-offs are a great place to see a variety of marine life, with a good chance of spotting larger pelagic fish in the blue.

La Source ('The Spring') is a unique dive site where a cool freshwater spring bubbles up from the seabed, creating a shimmering halocline. The surrounding coral reef is very healthy and is a great place to see turtles.

Labas Island is an adventure dive, a maze of giant underwater boulders that form numerous caves, tunnels, and swim-throughs. Exploring the complex topography is the main highlight, with soft corals decorating the rocks.

Off the coast of Labuan are four major shipwrecks, known as the Labuan Wrecks. They include two WWI wrecks (SS De Klerk and an unknown vessel), an Australian naval ship, and a fishing trawler, offering a fantastic variety for wreck enthusiasts.

Lady Elliot Island is a coral cay at the southern tip of the Great Barrier Reef, known as the 'Home of the Manta Ray'. It offers incredible, easily accessible diving with a huge population of turtles, manta rays, and pristine coral reefs.

Lady Musgrave Island is a large coral cay with a vast, protected lagoon, perfect for beginners and snorkelers. The outer reef offers beautiful wall dives, and the area is a hotspot for both green sea turtles and manta rays.

Laem Thian is a quiet dive site on the east coast of Koh Tao featuring a series of large boulders that form fun swim-throughs and small caves. It's a great spot to explore and is also known for its resident population of turtles.

Laguna Reef is a large, sheltered area behind the main Tiran reefs, offering very calm and easy diving conditions. It's a popular spot for training dives and for a relaxed third dive of the day, with beautiful and healthy coral gardens.

Laha is considered one of the premier muck diving sites within Ambon Bay. The silty, rubble-strewn slope is a hotspot for finding the rarest and most sought-after critters, including the endemic Ambon scorpionfish, rhinopias, and various frogfish.

Laje de Santos is a marine park that offers the best diving in Southern Brazil. The rocky island is a magnet for marine life, and is particularly famous for the large manta rays that visit during the autumn and winter months.

Lake Baikal is the world's oldest and deepest freshwater lake. It offers incredible ice diving in winter, with meter-thick, transparent ice creating stunning light effects. The lake is home to unique endemic species like the Nerpa seal.

Diving at Land's End offers a unique combination of attractions: playful sea lions from the local colony, the famous underwater 'sand falls', and a beautiful view of the iconic arch from below the surface.

Diving at Land's End offers a unique combination of attractions: playful sea lions from the local colony, the famous underwater 'sand falls', and a beautiful view of the iconic arch from below the surface.

Landers Reef, near Aliwal Shoal, is a beautiful reef with a complex topography of pinnacles, caves, and swim-throughs. It's a great spot to see a variety of rays and is another good location for seeing ragged-tooth sharks in winter.

Lankayan is a small, idyllic island in the Sulu Sea. It's a fantastic macro destination with many weird and wonderful critters. During the season, it becomes a hotspot for whale shark sightings, and it's also a major nesting site for green and hawksbill turtles.

Lanzarote is famous for the unique Museo Atlantico, but it also offers fantastic diving on its volcanic reefs. The sandy bottoms are one of the best places in the world to see the endangered angel shark.

Lastovo is one of Croatia's most remote and untouched islands. Its isolation has preserved its beautiful reefs and walls, and its exposed location offers the best chance in the Adriatic to see larger pelagic fish.

In 1988, the volcano on Banda Neira erupted, sending a flow of lava into the sea that destroyed the existing reef. In the years since, the coral has regrown at an incredible rate, and today the site is a stunning, dense garden of hard corals covering the black volcanic rock.

The Lavezzi Islands, between Corsica and Sardinia, are a marine reserve with a stunning underwater landscape of massive granite boulders. The sites, like 'Mérouville' (not to be confused with Port-Cros), are famous for their huge and friendly dusky groupers.

Layang-Layang is a remote atoll in the middle of the South China Sea, often called 'The Jewel of the Borneo Banks'. It's world-renowned for its pristine deep walls and the seasonal aggregation of scalloped hammerhead sharks that patrol the blue.

Le Grand Banc Externe is a large offshore pinnacle near Nosy Be that is a magnet for pelagic life. Its exposed location and strong currents make it the best place in the area to see a variety of sharks, including grey reef, silvertip, and sometimes hammerheads.