Big Tunnels

Type:

Scuba Diving

Entry:Unknown

Difficulty:Advanced

Tags:

PinnacleReefWall

About This Dive Spot

This site features a limestone pinnacle with a large tunnel accessed through an opening in the reef. The route passes through the tunnel and exits beneath a coral archway that leads out to a steep wall. Divers may encounter horse-eyed jacks, turtles, and pufferfish along the descent and around the reef structure.

Planning details

Reported depth and seasonality.

Reported depth

32m+

Depth note

Descent to about 32 m (105 ft) is described.

Safety & access

Hazards, restrictions, and required precautions.

Hazards

Overhead environment

Safety notes

Includes a tunnel penetration through an opening in the reef and reaches around 32 m; appropriate training, gas planning, and comfort in overhead environments are important.

Local intel

Community notes to help plan your visit.

Tailored notes for different activities.

Scuba

The dive includes a tunnel swim-through entered via a hole in the reef, descending to roughly 32 m before exiting toward a steep wall.

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Spots Near Big Tunnels

📍 0.1 km

Sentinel Rock

Not Set

Sentinel Rock is a wall dive around 27 m, centered on a coral pinnacle. A tunnel runs through the formation, with black corals and a variety of sponges inside. Divers can expect diverse marine life in the area, including tropical fish, nudibranchs, and octopuses.

📍 0.2 km

Orange Canyon

⚓

Orange Canyon is a dive site located west of Grand Cayman. The dive begins at a mooring ball and descends through a canyon to the wall at approximately 30 meters (100 feet). Divers can encounter large pelagics such as sharks and spotted eagle rays along the wall, while observing various coral and sponge species on top.

📍 0.3 km

Bonnie'S Arch

⚓

Bonnie's Arch is a dive site off the northwestern tip of Grand Cayman, centered around a prominent arch formation. The underwater terrain includes a mini wall and a cavern, with tube and barrel sponges around the base. Divers can expect encounters with Nassau groupers, spiny lobsters, tarpon, and angelfish.

📍 0.8 km

Rainbow Reef

⚓

Rainbow Reef lies in the Somosomo Strait and is reached by a short boat ride. It is described as a highly colorful coral dive with abundant marine life. The strait’s conditions support both hard and soft corals and a variety of reef species, including turtles, eels, anemones, and clownfish.

📍 1.2 km

Turtle Farm Wall

🏖️

This site features a small wall just offshore along the island’s northwest shore. It’s described as an easy shore entry with little to no current and typically clear water, making it suitable for relaxed dives. It also works well for snorkeling, with typical Caribbean reef life often seen along the wall and nearby reef area.

📍 1.4 km

Little Tunnels

Not Set

Little Tunnels is a dive site on the northwestern side of Grand Cayman, known for a long swim-through that links sand flats with deeper water. The main swim-through sits at around 18 m and is covered with gorgonians and barrel sponges. Fish life can include Spanish hogfish and stoplight parrotfish.

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Frequently Asked Questions

What's the best entry point at Big Tunnels?

Entry at Big Tunnels is detailed in the spot description above. Look for specific landmarks, access paths, and any tide or condition requirements. Local divers often share updated entry tips in their dive logs.

What conditions are best for diving Big Tunnels?

Optimal conditions at Big Tunnels depend on several factors including tide, wind, and season. Check recent dive logs for current condition reports and patterns. Generally, calmer seas and high tide provide better visibility and easier entry.

What is the maximum depth and typical visibility at Big Tunnels?

Depth and visibility information for Big Tunnels can be found in the spot details and recent dive logs. Conditions can vary significantly based on weather, tide, and season. Always plan your dive according to current conditions and your certification level.

Are there any safety considerations or local etiquette at Big Tunnels?

When diving Big Tunnels, respect local regulations, marine life, and other water users. Be aware of any specific hazards like currents or boat traffic mentioned in the spot description. Follow Leave No Trace principles and local diving etiquette.