For Pendeen you should ask at the manor house on Pendeen Manor farm for access. The fogou entrance is in a working farmyard which was ankle deep in cow slurry when we visited. Note also that the fogou itself can contain a lot of water in wet weather, we found our wellies came in very useful.

Both Haligyye and Pendeed have pitch dark sections so you will need a good torch or better still, headlamp.

Hope you're OK with spiders.

Maggie & Keith