FN 7
A hole located in the same doline as FN 6, beneath a large block, with a dynamited entrance, small climbs, small chambers and a cylindrical shaft 10 metres deep.
EspeleoWorld
FN 7
A hole located in the same doline as FN 6, beneath a large block, with a dynamited entrance, small climbs, small chambers and a cylindrical shaft 10 metres deep.
Saint-Martin-Lys
Length: 30 m · Depth: 20 m
Updated record
https://espeleoworld.com/en/c/fn-7-saint-martin-lys
Information can change. Always verify coordinates, access, weather, and cave conditions before setting out.
A hole located in the same doline as FN 6, beneath a large block, with a dynamited entrance, small climbs, small chambers and a cylindrical shaft 10 metres deep.
Description
Morphology
The entrance is dynamited and is followed by small climbs and small chambers leading to about -12 m. A window 3 metres high opens into a cylindrical shaft 10 metres deep, blocked at -20 m.
Other details
The cold draught, noticeable at the entrance, is lost along the way.
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Contains information from Grottocenter (Wikicaves), grottocenter.org, made available under the Open Database License (ODbL 1.0, https://opendatacommons.org/licenses/odbl/1-0/), modified. · https://grottocenter.org/ui/entrances/136965 · The derived data is available on request under the ODbL: [email protected] · data as of 2026 · Source: Grottocenter (Association Wikicaves), worldwide collaborative cave database (grottocenter.org), modified. CC BY-SA 3.0, https://creativecommons.org/licenses/by-sa/3.0/ Grottocenter (Wikicaves) · Text by Stochus (Description sommaire) · adapted by Espeleoworld (normalized, translated); the adaptation is licensed CC BY-SA 3.0, https://creativecommons.org/licenses/by-sa/3.0/ · https://grottocenter.org/ui/entrances/136965 · data as of 2026