Great Blue Hole:
This famous sinkhole (the only one visible from outerspace) is located in the center of the Lighthouse Reef Atoll, with a diameter of about 300 metres/1,000 feet and a depth of over 120 metres/400 feet. Near the recreational depth limit on the south side you can see huge stalactites and stalagmites.
Half Moon Caye Bird Sanctuary:
Located at the southeast corner of Lighthouse Reef Atoll, this reserve is home to loggerhead and the hawksbill turtles, which come ashore here annually to lay their eggs. Below the surface on the eastern side of the atoll, enjoy the sandy bottom (with its garden eels) and the reef wall with its numerous canyons and tunnels decorated with black corals, sea fans, sea whips, multihued sponges, and a colorful explosion of reef fish. Watch for nurse sharks and giant stingrays.
Located within the Hol Chan Marine Reserve, this site (as its name suggests) practically guarantees close encounters with schools of large stingrays and nurse sharks.
Tackle Box Canyon, Hol Chan Marine Reserve:
This reserve is renowned for nurse sharks and large grouper, but also boasts more than 160 species of fish and 40 species of corals, sponges, algae, and sea turtles. A sloping shelf provides swim-throughs in the form of deep crevices, winding to the reef’s outer edge where a great wall drops to depths beyond 40 metres/130 feet.
The Elbow, Turneffe Atoll:
A convergence of ocean currents at this site bring in pelagic swimmers like schools of horse-eye jacks, Atlantic spadefish, snappers and permit, as well as sharks and eagle rays. Turneffe is renowned for its sheer walls, where divers can see moray eels, turtles, rays, giant barrel sponges and large coral formations while drifting along the edge of the blue-water abyss.
Manta Wall, Glover's Reef Atoll:
Drifting along a sheer wall of hard corals, which include boulder star corals and mound corals that create unique swim-throughs. Look for star corals, nurse sharks, and groupers, as well as queen conch, trumpet conch and the king helmet conch in the sandy areas around this site.
Pinnacles, Glover's Reef Atoll:
Dramatic spires reach from a depth of 30 metres/100 feet, hosting sponges, plate corals and sea fans. Watch for hog snappers, schoolmasters, and pelagic species such as reef sharks, mackerel, tarpons, and barracuda.
This is a world-renowned spot for diving with massive whale sharks during full moons from late March through June. Also watch for the Mutton and Cuberra snapper whose full-moon spawning draws in the whale sharks.
Just south of Spanish Bay, this site is protected by the Turneffe Islands, resulting in calm waters and clear visibility. The wall dive features colorful corals, giant sea fans, sea whips, moray eels, sea turtles, crabs, lobster, horse-eyed jack, blue tangs, and sergeant majors. Also look for eagle rays, nurse sharks, large groupers, reef shark, dolphins, and even hammerhead sharks and manatees.
Sitting on the southern barrier reef, this wall-diving site boasts turtles, moray eels, barracuda, king mackerel, eagle rays and southern stingrays, as well as pedersen shrimp, gobies, cleaning stations, spotted drums, manta rays, hammerhead sharks, and dolphins.