Yes, the Old Man of Hoy is not a physical cache, i.e., no container with paper log. Its an earth cache. It just requires you to peer at it from the cliff and try to answer some geological questions on the website to claim it. (sorry other poster posted as writing this)
There are approx 400 physical extreme caches in the UK and about 5 of them are in shallow cave systems - small rifts mainly. There are about 30 more in adits and old quarry mines.
One "geocache" came out in a beginners system in the Mendips in November (which i've enjoyed doing). This was a virtual cache - again no container or log, you just had to take pictures at key points, e.g., down the Coal Chute, Coffin Lid.
Sadly, the "controlling website" has not allowed Virtual Caches for some time believing them not proper as there's no paper log. This one was as a special reward to a cacher (who is also a caver) for other non-caving caches of merit. He used his brain and set in "beginners system Mendips" (you have to solve location first on the geocache website) to give a great adventure without the need for a container. If the "controlling website" used its brain it would realise "Virtuals" as the as the environmentally sensitive solution to environments like some caves, for example.
There are approx 400 physical extreme caches in the UK and about 5 of them are in shallow cave systems - small rifts mainly. There are about 30 more in adits and old quarry mines.
One "geocache" came out in a beginners system in the Mendips in November (which i've enjoyed doing). This was a virtual cache - again no container or log, you just had to take pictures at key points, e.g., down the Coal Chute, Coffin Lid.
Sadly, the "controlling website" has not allowed Virtual Caches for some time believing them not proper as there's no paper log. This one was as a special reward to a cacher (who is also a caver) for other non-caving caches of merit. He used his brain and set in "beginners system Mendips" (you have to solve location first on the geocache website) to give a great adventure without the need for a container. If the "controlling website" used its brain it would realise "Virtuals" as the as the environmentally sensitive solution to environments like some caves, for example.