The Alden brook flows through a couple of culverts on it's journey to the River Ogden. This culvert is the downstream one and despite being pretty short at 150m it's particularly photogenic.
An 8ft waterfall brings the brook crashing down into the culvert then it's an arch with a stone riverbed throughout.
The riverbed has been calved out into small pools and cascades, some of them reasonably deep.
The culvert is short enough that it's just about possible to see light at both ends when you're stood in the middle.
Other than the waterfall the only real feature is a couple of supports, after this is a long cascade down to the outfall.
On the way out something dove into a pool outside the culvert. I crept up and saw what may have been a water vole playing around in the water, cute little thing.