London's Regent's Canal drained ahead of restoration
17 October 2014 Last updated at 10:55 BST
Road cones, shopping trolleys, even a bath tub - they have all been found on the bed of London's Regent's Canal.
It is the first of a number of canals in England and Wales to be drained ahead of vital restoration work.
It is a huge task that has involved draining the equivalent of 14 Olympic swimming pools.
BBC reporter Tim Muffett sent us this report.