Where is Kirrin Island?

What is the closest real-world analogue to Kirrin Island - say an island with a castle on it with dungeons? Anything down in Cornwall that fits the bill?

BTW, it boggles my mind that someone has tagged Five On A Treasure Island as "crossdressing" :)

Google "Kirrin Island". The first hit says "everyone knows" it is Corfe Castle. (I haven't even read the book, so I can't confirm that.)

I had an online friend tell me that she knew someone whose family owned the island used for one of the TV shows, but I can't remember which it was.

Corfe Castle:
http://www.enidblyton.net/famous-five/create-your-very-own-kirrin-island.html
http://www.storybookengland.com/authors.php?form_id=3414023092

Brownsea Island (home of the founding of Boy Scouts and Girl Guides) also gets suggested as inspiration for Kirrin Island, http://www.telegraph.co.uk/travel/main.jhtml?xml=/travel/2007/07/28/et-brownsea-...
and I've also seen people cite an island in the Channel Islands
http://www.enidblytonsociety.co.uk/forums/viewtopic.php?t=185&highlight=&amp...

And look (everyone else has probably already seen this, but I'm slow) the next time the Famous Five make it to screen it'll be as animated characters set in modern times, with the names Cole, Dylan, Jo and Allie. http://www.metafilter.com/56755/The-Famous-Fives-new-makeover
That's almost as funny, and purist fan outraging, as making Christopher Robin a girl!

And, uh, that was me using the cross dressing tag. Do you have a better tag idea for the not so uncommon subgenre of girls dressing as boys and going off to have adventures?
Some tagmashes that illustrate it:
http://www.librarything.com/tag/children's,crossdressing
http://www.librarything.com/tag/girls+dressed+as+boys
http://www.librarything.com/tag/crossdressing,young%20adult

I'd suggest transgender would be a more accurate modern term for George, but crossdressing works better as a tag for me, since in a lot of those types of stories the characters are crossdressing because they need a disguise or access to places girls can't go rather than, like George, wanting to be a boy.

It didn't occur to me to combine the tags. When I looked at the books most commonly tagged crossdressing, I didn't see many that I would associate with Enid Blyton, though :)

I was thinking more about the secret tunnels than I was the outer look of the castle, for Kirrin. Both Kirrin and the Island of Adventure have undersea tunnels that lead to the mainland; does anything like that exist anywhere?

http://findarticles.com/p/articles/mi_qn4159/is_20041024/ai_n12762658

Natural:
http://www.jncc.gov.uk/protectedsites/sacselection/habitat.asp?FeatureIntCode=H8...
http://www.kurg.org.uk/sites/natural_caves.htm

Not undersea:
http://www.dooyoo.co.uk/sightseeing-national/dover-castle/1014389/
http://news.bbc.co.uk/2/hi/uk_news/england/southern_counties/4442687.stm
http://www.hellfirecaves.co.uk/
http://en.wikipedia.org/wiki/Secret_passage

Urban:
http://www.fictionalcities.co.uk/tunnels.htm
http://library.thinkquest.org/3893/FAMOUS.HTM

Answer might be not really, but maybe they are forgotten and waiting for some kids to discover them!

it was definitely based on an island in dorset, I read a book about her and her love of Dorset but I cannot remember which castle it was... I'll see if I can find the book again

A number of years ago I had a holiday in Scotland and found myself standing on the seashore at Girvan, looking out at the island Ailsa Craig. I felt excited as I could not escape the thought that this was Kirrin island I was looking at. Subsequent research revealed (1) Ailsa Craig has a ruined castle, a bird sanctuary and a disused mine - the very elements of many a Famous Five story (2) Enid Blyton's first husband came from Ayr just up the road! It is easy to imagine he took her there often, and it is easy to imagine Enid altering the name Girvan to Kirrin for fictional purposes. Incidentally Girvan has a row of cottages almost on the shore, which I am sure I remember Kirrin Village having in the books. Any Blyton afficionados out there like to venture a comment?