"... They turned a little to the right, raced down a steep hill, and found the long Bridge of Beruna in front of them. Before they had begun to cross it, however, up out of the water came a great wet, bearded head, larger than a man's, crowned with rushes. It looked at Aslan and out of its mouth a deep voice came.
"Hail, Lord," it said. "Loose my chains."
"Who on earth is that?" whispered Susan.
"I think it's the river-god, but hush," said Lucy.
"Bacchus," said Aslan. "Deliver him from his chains."
"That means the bridge, I expect," thought Lucy. And so it did. Bacchus and his people splashed forward into the shallow water, and a minute later the most curious things began happening. Great, strong trunks of ivy came curling up all the piers of the bridge, growing as quickly as a fire grows, wrapping the stones round, splitting, breaking, separating them.
The walls of the bridge turned into hedges gay with hawthorn for a moment and then disappeared as the whole thing with a rush and a rumble collapsed into the swirling water. With much splashing, screaming, and laughter the revellers waded or swam or danced across the ford ("Hurrah! It's the Ford of Beruna again now!" cried the girls) and up the bank on the far side and into the town..."
In real life the 'Ford of Beruna' is one of originally three sets of stepping-stones across the River Shimna. This set is currently the only one you can officially cross on, as the one downstream was damaged and broken apart several years ago during heavy floods and the one further upstream is temporarily blocked off on one side.
All caches placed with the kind permission of the Tollymore Forest Park Ranger Service