Part of the Two Tunnels Greenway walking and cycling path, Coombe Down Tunnel is known to be the longest cycling tunnel in Britain and, therefore, by extension the longest running tunnel in Britain too. Around a mile (1.7 km) in length, it runs below Bath's southern suburbs, emerging below Coombe Down village. The tunnel was originally part of the Somerset and Dorset joint railway line.

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Elevation 80 m

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Saturday 13 December

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Take Me There

Location: Monkton Combe, South West England, England, United Kingdom

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