One of the biggest canal locks in Yorkshire has been drained for maintenance - and the public will be allowed a rare chance to walk along the lock bottom on Sunday.
The Canal and River Trust is investing about £100,000 in vital repairs to Sprotbrough Lock in Doncaster on the Sheffield amd South Yorkshire Navigation.
The lock, which is 75m long and seven metres deep, will be open on Sunday for a close-up look.
The open day runs between 10am and 4pm with the last entry to the lock at 3.15pm.
A similar open day at Bingley’s Five Rise Locks in 2011 attracted more than 7,000 people.
As part of the work at Sprotbrough, a new set of 9.5 tonne lock gates will be replaced.
Details are available at www.canalrivertrust/restorationandrepairs