Llywelyn ap Gruffydd's final night as a Prince was spent in this cave in Powys.
Known as Llywelyn the Last, Llywelyn ap Gruffydd went head to head with Edward I and was killed at the Battle of Orewin Bridge in 1282. Mystery surrounds the death of this celebrated Prince of Wales, but there are tales of English foul play and, although his head was sent to the Tower of London, no one is sure where he was buried.
A standing stone marks the spot near Cilmeri where he is thought to have been killed and a small cave, near Aberedw, on the bank of the River Edw near Llywelyn’s Castle, is the atmospheric spot where Llywelyn the Last is said to have spent his final night.
See more of Secret Britain
Mynydd Carningli, Pembrokeshire: The ancient volcano in the shape of a reclining woman
The peak of this remote mountain in West Wales is the next spot to make our Secret Britain list.
Thorney Island, West Sussex: The beauty spot accessed via a secret button through a barbed wire fence
The beaches of Thorney Island, next to Chichester Harbour, are our Secret Britain selection today.
10 of the best secret gardens in Britain — and how you can visit them
The lure of a secret garden is as strong now as it was when Frances Hodgson Burnett first published The