At 104ft high, 440 yards long with 24 arches the Ribblehead Viaduct has become one of the most important features in the Yorkshire Dales.

Pen-y-ghent seen from Blue Clay Ridge, Little Dale.

The unmistakable shape of Ingleborough seen from the north.

The Force Gill Aquaduct.

Built to last, the Force Gill Aquaduct.

Looking down what remains of the tramway used to transport building materials in the construction of the Blea Moor Tunnel.

One of the Air Ducts ventilating the 2876 yard long Blea Moor Tunnel.

Little Dale seen down the Blea Moor Tramway.

Looking to Great Knoutberry Hill and Wold Fell from the descent of Blea Moor.

The River Dee in upper Dentdale.

Artengill Viaduct, 11 arches, 117ft high, 220 yards long, built with massive blocks of Dent Marble.

Looking to the lower slopes of Whernside across Dentdale.

The summit Great Knoutberry Hill.

Pen-y-ghent seen from the summit of Great Knoutberry Hill.

Looking to Ingleborough rising above Ribblehead.

Views down Dentdale seen from the ascent of Wold Fell.

Great Knoutberry Hill seen from the summit of Wold Fell.