Dive Site Information
This tunnel is like a natural underwater cathedral, full of ever-changing plays of light and color.
Type
Caves & Tunnels
Dive Type
Cave & Reef
Popularity
High
Lenght
110m
Qualification
Mim Open Water
Depth
40 (Max)
Shore access
Easy
Hazards
Good buoyancy control is a must as boats pass through the tunnel and the safety stop is done inside it.
The Lagoon
The Inland Sea is a shallow semi-circular lagoon, about 60 m wide, connected to the Mediterranean Sea by an 80 m long tunnel cave that passes through the rock.
There is not much for divers to see in the Inner Sea. The lagoon floor is mostly made up of pebbles and rocks and the maximum depth is about 2 m. What makes the dive special is the tunnel.
The Tunnel
This tunnel is like a natural underwater cathedral, full of ever-changing plays of light and color. Sunlight filters through the large opening at the end, creating a surreal shade of blue that intensifies as you get closer to the exit. Halfway through, if you shine your dive light on the tunnel walls, you’ll discover hidden details: tiny crevices filled with purple and pink sponges, delicate yellow encrusting corals, and even the occasional fluorescent nudibranch.
Then comes the best moment: emerging from the tunnel into the vast blue of the open sea. The contrast is breathtaking: from the golden glow of the passage to the brilliant, deep cobalt of the Mediterranean. Schools of barracuda or the occasional amberjack might pass by, while the vertical reef walls outside the tunnel are covered in patches of red and purple coralline algae.
Jacques Cousteau is said to have named the Inner Sea one of his ten favorite dives.