The Blue Hole (Voulisma) | Crete’s Lit Cavern

Site Overview

The Blue Hole at Voulisma, near Agios Nikolaos, is a sinkhole-like formation carved into the limestone coast, where divers fin through a lit opening into a chamber full of glassfish and morays. Diving the hole is a gentle, shallow experience suited to Open Water divers, with octopus and nudibranchs in the recesses and the bright Cretan water making the rock glow. The site is a shore entry close to Agios Nikolaos and reliable enough for a lovely wide-angle photography trip as much as a dive. It is a perfect half-day and a great second dive of the day. For visitors who want an easy taste of cavern diving without the commitment of a deep or technical site, the Blue Hole is an accessible, fish-filled introduction. The Blue Hole (Voulisma, Agios Nikolaos) sits within Crete (North Coast) and is best described as a cave and cavern dive. The water here is typically clear, and the profile — from around 2 m down to 20 m — gives beginner divers a rewarding range of routes. Among the life you can expect are Glassfish, Mediterranean Moray, Common Octopus, Anthias, Nudibranch. The site rewards a slow, observant approach, and good buoyancy keeps both diver and reef safe. With sensible planning around weather and boats, it ranks among the more memorable stops on a Greek diving trip.