A section of canal in Kent dating back to the 19th Century has been given Grade II listed status.
The Gravesend Canal Basin, which originally formed part of the Thames and Medway Canal, is being renovated as part of the Thames Gateway project.
The listing, by Culture Secretary Jeremy Hunt, includes the canal basin and the swing bridge.
It also recognises the 19th Century walls and two locks, one of which was rediscovered under a disused car park.
"I am delighted and applaud any action that helps protect our waterway heritage from inappropriate development," said chairman of the Thames and Medway Canal Association, Brian Macknish.
"The listing of this fantastic piece of heritage brings us a step closer to realising a long-term ambition of reopening the stretch of canal between the canal basin and Mark Lane, making more than three miles of navigation accessible from the River Thames."
Improvements to the canal basin are part of a wider project to create a series of waterfront spaces linking the town centre to the countryside.