Ranging from depths of 12m to 40m, the site is a group of massive rocks arranged in a rough oval and running north to south.
Visibility is superb in season, and the site plays host to a wide variety of pelagics as well as reef fish. Great barracuda, king mackerel, grouper, and tuna throng to Chumphon all year around, and in season whale shark sightings are common.
As the site is a fair distance offshore, visitors from the open ocean are unpredictable -sailfish, oceanic white tip sharks and bull sharks have also been spotted.
Large groupers can be seen here as well, along with scribbled filefish and masked porcupine fish. The observant diver may spot scorpion fish and stonefish camouflaged on the rocks.
The most noticeable feature of the dive is "the chimney" - a vertical tunnel in the rock that leads you from 18m to 8m, but the entire site (from the surface to 45m) is full of points of interest. The rock is riddled with small holes which makes a perfect habitat for white eyed and yellow margin moray eels, and the large anemones that cover it are filled with anemone fish and shrimp.
Whale sharks can be seen in the winter months here as well, and keep an eye out for other large pelagics. Octopus camouflage themselves so exactly to match the covering of the rock that you may miss them completely, but keep your eyes peeled - they are there.
White eyed moray eels, blue spotted fantail rays, porcupine and puffer fish, and an enormous variety of reef fish are almost guaranteed in the beautiful shallow coral garden, while the fortunate may also see whale sharks, leopard sharks, reef sharks and other pelagics on the deeper side.
Titan triggerfish add an element of excitement to each dive, and divers often spot turtles and sea snakes.
White tip reef sharks can be seen from time to time, and at the deeper end of the site large grouper and schools of yellowtail, fusilier and silverfish can be seen. Look out for "the minefield", where scores of yellow margin and Titan triggerfish have made their nests in sandy pits.
But no need to spend the dive looking over your shoulder, let Big Blue's instructors and divemasters keep an eye out while you enjoy the sea snake, turtle, moray, blue spotted ray, butterfly fish or angelfish.
Look closely in the stag horn coral for porcupine fish and hermit crabs, and see if you can spot a well-camouflaged scorpion fish or two.
The resident turtle is only shy if you get too close. Observe her from a distance and she'll eat placidly away.
Two groups of rocks at depths from 10m to 18m. Your divemaster or instructor may show you the haunts of grouper, panda clownfish and stingrays, but if you take your time and look closely you might also see anemone shrimp, morays, flatworms and pipefish, as well as cleaner wrasse at their never-ending work.
Check the crevices for baby angelfish, keep an eye on the water above for squid and crocodile longtom and look for the dancing fins of the juvenile sweet lips.
Whip coral, soft coral and sea fans are common and blue spotted stingrays are abundant and a huge number of groupers can be seen hiding in nooks and crevices. Turtles are sometimes seen foraging among the coral or resting on top of the pinnacle.