I work in a police control room in Brighton, nearby they had a WWII tank training ground. Always getting calls to found unexploded shells in that area.
Fishing boats have a habit of finding old mines on the seabed but the fishermen don't tell anyone until they get to harbour when the risk has increased by mooring near to other ships and shore installations.
Mind you we also get some good intent calls. One last week of a large, rusty, unexploded shell turned out to be an old boiler chucked in a hole by its former owner.
