I found an e-trek GPS device on the floor in a car park and took it in to the local police station. They told me they'd file it but had no room (it is as big as a packet of fags...how much room do they need?) so I should take it home and if no-one claimed it in 30 days, it was mine! So it's now mine.
Another slightly more disturbing thing occurred when we found a greyhound cowering under a motorway bridge on a Sunday morning, obviously thrown out by its owners for not winning the night before, and we took him to the same police station as the one above. They told us their kennels were full and that we should take the dog home with us! We jokingly asked if it would be ours in 30 days if no-one collected it and were told yes, he would be ours! We took him to another police station and they were only too keen to house the poor, cowering, but tall, dog.