Ever heard of the British Caving Library? (and yes, Jeremy Corbyn's dad wrote an article in The Speleologist)

Caving.wales have a page for this sort of query - https://cambriancavingcouncil.org.uk/restricted%20access%20caves.html

Thanks for introducing us to this site - where we can see that confirmation from NRW that all Llangattock and Llangynidr, plus a lot more along to Merthyr, is now in one huge SSSI. See separate post in Wales section...

It has been known for some time that NRW have been planning to extend the existing Llangattwg and Llangynidr SSSIs but this is the first time I have seen a public notification - Mynyddoedd Llangynidr a Llangatwg, Cefn yr Ystrad a Chomin Merthyr SSSI The new boundaries are shown by choosing the...

There is a review by A.L.Butcher of the 1963 revised plan in CRG Newsletter 92. It says that PUSA had "been engaged for some time on resurveying sections of the Gaping Gill system...". He also wrote that the Secretary of PUSA was R.Taylor of Sprinkfield Road, Huddersfield - so it wasn't just...

An unfortunate addition to this thread comes in news of a 'hunter' (perhaps looking for birds nests?) found dead three days ago in 'a narrow cave near Sungai Temala', a river in the Middle Baram region of northern Sarawak...

An interesting two part account contributed by a Merthyr historian, including a picture of Pwll Morlais, an old karstic sink which had its water supply cut off long ago by a diversion to supply to the iron works below. The council now want to reduce the flow now culverted under much of Methyr -...

Eli Simpson's photo album for 1933/4 has a photo of Miss Montagu in GG Pool Chamber [via https://earthwise.bgs.ac.uk/index.php/Eli_Simpson_Archive or, better, https://archives.bcra.org.uk/archive.php?level=image&collection=bsa&document=ES003&item=4&zoom=1 ] She is the likely model in several...

I just found out that, in 1939, at the Luma Works, Cardiff made "SPECIAL LAMPS for CAVING" - https://archives.bcra.org.uk/archive.php?level=image&collection=bsa&document=ES067&item=670&zoom=1 They had been there in Sanatorium Road (Canton) since 1926, and continued into the 1960's -...

The University College, Cardiff [Caving Club] were at a meeting to set up the Cambrian Cave Registry early in 1966 - SWCC n/l 52, p.21... There were some prominent caving academics such as biologists G.T.Jefferson and Ann Mason/Williams/Edington, and psychologist Hywel Murrel... At least some...

After a moment's deep consideration, this purported 6th entrance to the Pwll Du cave system will not be added to the Cambrian Cave Register until full details of history, governance and access, hard copy references (for lodging in prominent public libraries and museums), and a high grade survey...

Fully illustrated paper available online and as pdf at https://www.nature.com/articles/s41586-024-07541-7?WT.ec_id=NATURE-202407

Indeed, the use of highway and tunnel tags seems inappropriate: way and cave have been suggested in the past but apparently not approved (albeit they do seem to be usable, as in the examples in your link, which also show that information can be recorded at a level below what users will normally...

Actually, zoom in far enough and see that mapy.cz has passage plague too...

I think asheshouses, for one, will agree with me that on https://www.openstreetmap.org/way/110284383#map=18/51.83548/-3.18058 conifermapper has mixed up the original and Ogof Gam enrances: what this shows of their caving background is unclear. Also, if you swap to OpenCycleMap you will see that...