Big Tunnel
Upcoming departures
Free DAN Insurance to keep your dives covered
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60% of divers returns to us
60% of divers returns to us
Live expert support, available whenever you need guidance
Liveaboard cruises offering dives at the Big Tunnel
All about Big Tunnel dive site
Big Tunnel, also called Big Tunnels, is one of Grand Cayman’s more memorable wall dives, with a limestone pinnacle leading into a large swim-through. The dive feels architectural, moving from reef structure into a cavern-like passage before opening back toward the wall.
What to see
Horse-eye jacks, rope sponges, sea whips, wall corals, reef fish, turtles, and barracuda may be seen. The swim-through itself is the main feature, especially for wide-angle photography.
When To Go Diving
Best from November to April, when visibility and surface conditions are usually strongest. Water is generally around 25–30°C, and clear conditions make the tunnel and wall especially impressive.
