etesianimaging:
Hutton jet mine.
etesianimaging:
Hutton jet mine.
etesianimaging:
Hutton jet mine.
etesianimaging:
Hutton jet mine.
etesianimaging:
Sandsend tunnel drainage adit.
etesianimaging:
Boulby alum tunnel entrance.
etesianimaging:
Boulby alum tunnel entrance.
etesianimaging:
Boulby alum tunnel (past the roof collapse).
etesianimaging:
Cat Beck drift.
etesianimaging:
Cat Beck drift.
etesianimaging:
Ravenscar Tunnel.
etesianimaging:
Drift in Sandsend tunnel.
etesianimaging:
Sandsend tunnel ventilation shaft.
etesianimaging:
Drift in Sandsend tunnel.
etesianimaging:
Grinkle Mine tramway tunnel
etesianimaging:
Grinkle Mine tramway tunnel
etesianimaging:
Ventilation shaft in Sandsend Tunnel.
etesianimaging:
Kettleness tunnel and adit entrance.
etesianimaging:
Mulgrave tramway I
etesianimaging:
Mulgrave tramway II
etesianimaging:
Mulgrave tramway III
etesianimaging:
Mulgrave drift.
etesianimaging:
Grinkle Mine culvert.
etesianimaging:
Grinkle Mine culvert.
etesianimaging:
Air door deep under Grinkle.
etesianimaging:
Guisborough Ironstone I
etesianimaging:
Guisborough Ironstone II
etesianimaging:
Guisborough Ironstone III
etesianimaging:
Guisborough Ironstone IV
etesianimaging:
Guisborough Ironstone V
