alasdair neill
New member
Currently this is quoted as Holl o Boadie on Papa Stour, Shetland, quoted as 300m or 400m long, the length probably originating from the 1878 6" OS map which shows a length of about 990 feet so 300m is likely to be correct. This has been copied onto even the most recent OS maps. A post on the web (which I have been unable to relocate unfortunately) states the OS mislocated one of the entrances so the length between entrances may be too long.
A list of the Worlds longest sea caves,
http://www.caverbob.com/seacave.html
gives Holl o Boadie as the 8th longest sea cave in the world.
Recently partly surveyed a cave in Cornwall with over 200m done so far and an estimated 100m left to do, which could prove to be the longest surveyed sea cave in Britain when this is complete (next weekend?).
A list of the Worlds longest sea caves,
http://www.caverbob.com/seacave.html
gives Holl o Boadie as the 8th longest sea cave in the world.
Recently partly surveyed a cave in Cornwall with over 200m done so far and an estimated 100m left to do, which could prove to be the longest surveyed sea cave in Britain when this is complete (next weekend?).