An abandoned and flooded Victorian railway tunnels on the Pennines could be restored for use by cyclists and tourists.
The Victorian Society on Friday threw its weight into the 1.4mile (2.3km) Queensbury tunnel.
Victorian and Edwardian buildings, which also includes a crumbling country mansion in Norfolk, an architecturally unusual church at Warrington and an Arts and Crafts pub in Croydon.
Halifax and Keighley and the longest tunnel on the company's network when it opened in 1878.
Passenger and freight services on the line were stopped in the 1950s and it is currently abandoned and flooded.
Campaigners want the tunnel to be restored as a cycle path, the centerpiece of a new network linking Halifax and Bradford. The Department of Transportation wants to fill in sections of the tunnel with concrete and leave it to collapse.
The society said the tunnel symbolized "the irreplaceable infrastructure legacy left to us by the Victorians".
Christopher Costelloe, the society's director, said the tunnel "could be the heart of a new transport revolution, bringing cyclists and tourists to this part of Yorkshire. If it is filled in, this irreplaceable asset will be lost for ever. "
He pointed to the "Triumphant Success" of the Two Tunnels Cycleway at Bath, a 13-mile loop for cyclists and walkers that includes the Mile-long Combe Down Tunnel.
"There is no reason why Yorkshire, now the beating heart of British cycling, could not do the same," Costelloe said.
The hope is the list, in its 12th year, wants to inspire the public to get involved with the nation's heritage. Rhys Jones, president of the Victorian Society, said it was both "inspiring and saddening" to see the top 10.
"Who would have thought that a call to arms would look like a wealth of distinguished and absorbing architecture?" From libraries to pubs to gorgeous theaters, these are gems. We are not looking at the second rate here. We are looking at real historical monuments, "he said.
The country mansion on the list is a grade I listed gothic pile called Shadwell Court in Norfolk. It was built in 1715 but extended and remodeled out of all recognition in the 19th century.
It has been empty since the mid-1990s and is owned by a member of the Dubai Ruling Family, the Society said.
Costelloe said, "Shadwell Court's owner can afford to look after this important building properly. This major country house has been neglected for too long and it wants to be a scandal. "
The former church of St Luke at Warrington was declared redundant 30 years ago and has been used as builders' storage. George Frederick Bodley, with a double nature under a single roof.
"It is extremely unorthodox and highly inventive, and the result is remarkable," the society said.
The former Leslie Arms pub in Croydon is an example of a problem, Costelloe said, with Victorian pubs closing all over the UK. "This is a building of great quality. The right owner is needed, "he said.
Chatterley Whitfield Colliery, a disused coalmine on the outskirts of Chell in Staffordshire; Everton Library, one of the earliest public libraries in Liverpool; Hulme Hippodrome in Manchester; Cowbridge school in south Wales; the Pelican Works at Birmingham's jewelery quarter; and the Corn Exchange and former town hall in Swindon's old quarter.