Near Porthkerry Park off the main track. Porthkerry Park is a large, public country park on the coast between Barry and Porthkerry in the Vale of Glamorgan in south Wales. It has fields, extensive woodland and nature trails, cliff-top pathways, a pebble-stone beach, and a small golf course. With the combination of green areas and the coastal location, the park is a popular destination for local primary schools taking their pupils on trips to study nature.
In the woods at the base of a tree Could be hard to find but shouldn't be too hard. The cache is a tube covered in black tape so should be fairly easy to spot. Please replace exactly where you found it.