Sottish Water, manager of the country's sewer systems, apparently spends £6 million a year rooting out clogged pipes, which are sometimes plugged up with curious things that were flushed or fell into storm drains: toy soldiers, a Mexican desert king snake, a cow, etc. From STV.TV:
A goldfish now named Pooh, recovered in East Kilbride, South Lanarkshire, and a frog found in a pump in Dornoch, Highlands, were none the worse for their time inside the sewer system. A live badger found in a pumping station well at Drongan in Ayrshire also made a full recovery after it was rescued by the Scottish SPCA.
However, a sheep found in a manhole chamber and a cow recovered from a storm tank were not so lucky.
As well as animals, Scottish Water workers recovered items including a hardy Action Man still wearing his boots and an iron that still worked despite its time in the network. Workers in Dumfries even found the credit card of one of their colleagues, which had been stolen from his wife's handbag on a night out.
Found in sewers (via Fortean Times)