

Best for intermediate divers, 8-40m, boat entry, variable current.
Le mystère de la Cathédrale is an artificial reef site located off the Geneva Shore in Switzerland. The site consists of former molasse quarries, providing a unique underwater topography for divers. Depths range from 8 to 40 metres, with an average depth of 20 metres. Access is by boat only. Conditions are variable, with visibility ranging between 8 and 20 metres. Divers should be prepared for cold water temperatures, as deep layers remain around 4°C year-round. Due to the depth, potential for entanglement, and variable currents, this site is suited for intermediate divers. Night diving is permitted at this location.
46.23204, 6.15183
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Recorded at this site
Depth
8-40m
Visibility
8-20m
Skill Level
Intermediate
Entry
Boat
Boat required
Current
Variable
Typical Dive
30 min
No, this site is intended for intermediate divers due to the depth, potential for entanglement, and variable currents.
The site ranges from 8 to 40 metres in depth, with an average depth of 20 metres.
Access to Le mystère de la Cathédrale is by boat only.
Visibility ranges from 8 to 20 metres. Deep water is consistently cold, typically around 4°C year-round, with summer stratification creating warmer surface layers.
Yes, night diving is permitted at this site.
Diving at Le mystère de la Cathédrale in Geneva requires the following certifications: Open Water, Advanced. Always dive within your training limits.