Ogof Craig a Ffynnon
| Ogof Craig a Ffynnon | |
| Brecknockshire | |
|---|---|
 Speleothems in Hall of the Mountain King | |
| Co-ordinates: | 51°48’32"N, 3°7’58"W |
| Length: | 4½ miles |
| Access: | Mynydd Llangatwg Cave Management and Advisory Committee |
Ogof Craig a Ffynnon is a cave in Brecknockshire. The cave is about 4½ miles in length (but often cited as longer. The cave is renowned as one of the most well-decorated caves in the mountains.
The cave's name is Welsh, and means "Rock and Fountain Cave".
Ogof Craig a Ffynnon contains some early short crawling sections (and what is known as an arduous and uncomfortable boulder choke) and some wet passages with voluminous quantities of mud before developing into a series of large sections lavishly decorated with mud and calcite formations. The most spectacular of these is the Hall of the Mountain King (named from a scene in Grieg's Peer Gynt), a large cavern liberally adorned with flowstone.
Beyond the well-decorated section the cave continues in a long series of low passages. It is thought that the cave will eventually be connected to the theoretical Llangattock System through Ogof y Daren Cilau. Since November 2004, access to the cave has been controlled by the Mynydd Llangatwg Cave Management and Advisory Committee (this means a key must be obtained to gain access through the door).
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