Spain, Castile and Leon, Salamanca, The Roman Bridge of Salamanca with Salamanca Cathedral behind.

Republic of Ireland, County Sligo, Ben Bulben mountain seen from Lukes Bridge area with rhododendrons in the foreground.

Republic of Ireland, County Sligo, Ben Bulben mountain seen from Lukes Bridge area with rhododendrons in the foreground.

France, Midi Pyrenees, Millau Bridge, The tallest motorway bridge over the Tarn valley.

Bridges, Iron, Scotland, The Forth Rail Bridge. The west side seen from South Queensferry and reflected in shallow water in the foreground.

Luxembourg, Transport, Bridges, View towards Grand Duchesse Charlotte Bridge from the south with Luxembourg City buildings and trees below.

France, Languedoc-Roussillon, Loz?re, La Mal?ne. Arched stone bridge over the River Tarn leading to town in the Tarn Gorge with steep sided rocky hillside behind.

Wales, Dyfed, Coastline, Green Bridge of Wales natural coastal rock arch near St Govans Head formed by erosion from waves.

Switzerland, Valais, Near Brig, Bridge over Gantetal on Simplon Pass.

Ireland, County Kerry, Killarney, Old Weir Bridge at the Meeting of the Waters where Killarney's 3 lakes meet.

Ireland, County Kerry, Killarney, Old Weir Bridge at the Meeting of the Waters where Killarney's 3 lakes meet.

Ireland, County Kerry, Killarney, Old Weir Bridge at the Meeting of the Waters where Killarney's 3 lakes meet.