This old dry dock is right at the mouth of the river Hull, opposite the Deep. It used to be home to a Manx steamboat that was used as a nightclub but that sailed off into the sunset ten or more years ago. Unfortunately when it left they couldn't close the dock gates, so for a decade the mud and silt of the Humber has washed in and filled it up completely. The owners of the site are planning to make some kind of tourist attraction out of it so they have cleaned it up with a hosepipe and a pump with the result you now see. The dock gates have now been sealed so they won't have to do it all over again.