Tunnel: avon gorge firing range tunnel, bristol, united kingdom (uk)

Avon gorge firing range tunnel back entrance graeme hogg, bristol, united kingdom (uk).

Avon gorge firing range tunnel entrance, bristol, united kingdom (uk).

Avon gorge firing range tunnel entrance, bristol, united kingdom (uk).

Avon gorge firing range tunnel graeme hogg, bristol, united kingdom (uk).

Avon gorge firing range tunnel graeme hogg, bristol, united kingdom (uk).

Guide to urban underground Bristol.