Earthworks
Earthworks
The Border Counties Railway across moorland beyond Kielder on a low embankment, en route to Riccarton Junction.
Sept 2008
Earthworks
Interiors
Cycle-friendly paving has been laid in Instow Tunnel which welcomes hundreds of Devon holidaymakers every year.
Sept 2008
Interiors
Tunnels in infrared
The north portal of Oxendon Tunnel's Up bore which is used by the Brampton Valley Way.
May 2011
Tunnels in infrared
Only remaining portal
Although its southern portal is now buried, the northern entrance to Ardsley's curved tunnel still looks out into a short cutting which walkers pass by on the Trans Pennine Trail.
June 2015
Only remaining portal
Portals of longer tunnels
Discarded for a younger model next door, Colwall Old Tunnel is one of the country's longest disused bores at 1,567 yards.
May 2009
Portals of longer tunnels
Portals of shorter tunnels
The Tiviot Dale route to the south of Manchester passed beneath Wellington Road and Stockport's famous viaduct in a 246-yard tunnel.
June 2012