It's a nice smelly location cache set-up on a hot summer's day. It's a place I often walk past with Charlie, my dog.
The ground is very muddy, up to about 20cm of silt/mud to walk through - so Wellington boots are a must! Also, at the start of this underground tunnel, there are a few cast iron pipes to climb over; you can see a picture of one in the photos.
Another water-based cache in Oxford belongs to my friend Daniel Glover, it's the Boundary Brook: The underground one. https://coord.info/GC5X7TW
More water-based caches of Daniel's are miles away in Abingdon, but worth while doing.
A good hard water-based cache, which you can stand up for a good amount of distance but needs a flotation device, is: Stert stream
Another easier tunnel-based cache (no flotation device needed) is this: Radley brook
Not quite as difficult, but three foot head-height, so there's a lot of bending: Larkhill stream
Another wet one! The A34, the wet one
The last, Abingdon based water cache is this: Under the bridge, you might get wet
Hard water-based cache is this; it is in Wantage: Let's go up the concrete pipe. You will get wet