Bridge on the old tramway in Leanachan Forest, Spean Bridge. Built in the 1930s for the construction of a 24km tunnel from Loch Treig to Fort William for a hydro-electric power scheme.

Bridge on the old tramway in Leanachan Forest, Spean Bridge. Built in the 1930s for the construction of a 24km tunnel from Loch Treig to Fort William for a hydro-electric power scheme.

Bridge on the old tramway in Leanachan Forest, Spean Bridge. Built in the 1930s for the construction of a 24km tunnel from Loch Treig to Fort William for a hydro-electric power scheme.

Bridge on the old tramway in Leanachan Forest, Spean Bridge. Built in the 1930s for the construction of a 24km tunnel from Loch Treig to Fort William for a hydro-electric power scheme.

Bridge on the old tramway in Leanachan Forest, Spean Bridge. Built in the 1930s for the construction of a 24km tunnel from Loch Treig to Fort William for a hydro-electric power scheme.

Bridge on the old tramway in Leanachan Forest, Spean Bridge. Built in the 1930s for the construction of a 24km tunnel from Loch Treig to Fort William for a hydro-electric power scheme.

Bridge on the old tramway in Leanachan Forest, Spean Bridge. Built in the 1930s for the construction of a 24km tunnel from Loch Treig to Fort William for a hydro-electric power scheme.

Bridge on the old tramway in Leanachan Forest, Spean Bridge. Built in the 1930s for the construction of a 24km tunnel from Loch Treig to Fort William for a hydro-electric power scheme.

Bridge on the old tramway in Leanachan Forest, Spean Bridge. Built in the 1930s for the construction of a 24km tunnel from Loch Treig to Fort William for a hydro-electric power scheme.

Entrance to tunnel leading to pitch at Celtic Park home of Celtic Football Club in Parkhead , Glasgow, Scotland, United Kingdom

Entrance to tunnel at Celtic Park home of Celtic Football Club in Parkhead , Glasgow, Scotland, United Kingdom

Loch Glascarnoch hydro-electric reservoir, looking across to the tunnel outlet for water piped from Loch Vaich, Scotland

Underground coal face exhibition with machinery at the National Mining Museum at Newtongrange in Scotland, United Kingdom.

Underground coal face exhibition with machinery at the National Mining Museum at Newtongrange in Scotland, United Kingdom.

Underground coal face exhibition at the National Mining Museum at Newtongrange in Scotland, United Kingdom.

AN OLD COUPLE MAKE THEIR WAY THROUGH THE BRIDGE OVER THE CLYDESIDE EXPRESSWAY, GLASGOW. PIC:IAIN MCLEAN/SCOTTISH VIEWPOINT Tel: +44 (0) 131 622 7174 Fax: +44 (0) 131 622 7175 E-Mail : info@scottishv...

The Harbour Tunnel on the Dysart town trail, Dysart, Fife. Picture Credit : Iain McLean / Scottish Viewpoint Tel: +44 (0) 131 622 7174 E-Mail : info@scottishviewpoint.com This photograph cannot be u...

Visitors in the observation tunnel at Deep Sea World aquarium watch as a Sand Tiger shark (Carcharias taurus) swims overhead in the aquarium at North Queensferry, Fife, Scotland. Picture Credit : Gary...

Visitors in the observation tunnel at Deep Sea World aquarium watch as a Sand Tiger shark (Carcharias taurus) seems overhead in the aquarium at North Queensferry, Fife, Scotland. Picture Credit : Gary...

Visitors in the observation tunnel at Deep Sea World aquarium at North Queensferry, Fife, Scotland. Picture Credit : Gary Doak / Scottish Viewpoint Tel: +44 (0) 131 622 7174 Fax: +44 (0) 131 622 717...

Ocean world North Queensferry Pic: D. Barnes / Scottish Viewpoint Tel: +44 (0) 131 622 7174 Fax: +44 (0) 131 622 7175 E-Mail : info@scottishviewpoint.com Web: www.scottishviewpoint.com This photog...

The access tunnel portal to Culligran Hydro-electric Power Station, Glen Strathfarrar, Scottish Highlands. Constructed as part of the Strathfarrar project between 1958 and 1962 Pic: Alan Gordon / Sc...

Boat approaching Roughcastle tunnel, Falkirk Wheel, Central Region, Scotland, September, 2009 Pic: D. Barnes / Scottish Viewpoint Tel: +44 (0) 131 622 7174 Fax: +44 (0) 131 622 7175 E-mail: info@sco...

Looking down to a train emerging from the tunnel under the Mound as it approaches Waverley Station, with the National Gallery of Scotland and Edinburgh Castle visible, in the city centre of Edinburgh....

THE ENTRANCE TO THE TUNNEL AT GOB NA H-AIRDE AT THE BASE OF CLIFFS ON HIRTA, ONE OF SEVERAL ISLANDS IN THE ST. KILDA ARCHIPELAGO - A NATURE RESERVE IN THE HANDS OF THE NATIONAL TRUST FOR SCOTLAND, IN...

Neolithic village prehistoric house room hearth and dresser from entrance SKARA BRAE ORKNEY