On a recent trip to Edinburgh, I noticed some rubbish near to the top of Arthur's Seat. Naturally, I CITO'd it but it struck my mind that it could be repurposed as a geocache.
To the north of the location, you may notice Ipswich's premier recycling facility. To the south, the final stretch of the river Gipping before it turns tidal. There is a surprising amount of birdlife on the river, along with some rather large fish. If you are lucky, you might spot a cormorant.