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The Royal Albert Bridge is a railway bridge which spans the River Tamar between Plymouth, Devon and Saltash, Cornwall. Its unique design consists of two 455 feet lenticular iron trusses 100 feet above the water, with conventional plate-girder approach spans. This gives it a total length of 2,187.5 feet. It carries the Cornish Main Line railway in and out of Cornwall. It is adjacent to the Tamar Bridge which opened in 1962 to carry the A38 road.
The Royal Albert Bridge was designed by Isambard Kingdom Brunel. Construction commenced in 1854 and the completed bridge was opened by Prince Albert on 2 May 1859. It has attracted sightseers since its construction and has appeared in many paintings, photographs, guidebooks, postage stamps and on the UK £2 coin. Anniversary celebrations took place in 1959 and 2009.
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Grade I listed buildings and structures are of exceptional, even international importance. There are over 6,000 in the country. Only 2.5% of listed buildings are Grade I listed.
In Scotland the classification is Category A
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The Tamar (Cornish: Dowr Tamar) is in south west England, it forms most of the border between Devon and Cornwall.
The Tamar's source is 3 miles from the north Cornish coast, but it flows southward and its course runs across the peninsula to the south coast. The total length of the river is 61 miles. At its mouth, the Tamar flows into the Hamoaze before entering Plymouth Sound. Tributaries of the river include the rivers Inny, Ottery, Kensey and Lynher (or St Germans River) on the Cornish side, and the Deer and Tavy on the Devon side.

The Cornish Main Line is a railway line in Cornwall. It runs from Penzance to Plymouth, crossing from Cornwall into Devon over the famous Royal Albert Bridge at Saltash.
It directly serves Truro, St Austell, Bodmin (by a Parkway station), and Liskeard, and it forms the backbone for rail services in Cornwall, as well as providing a direct line to London, Birmingham, Leeds and Edinburgh. There are branches off the main line serving St Ives, Falmouth, Newquay, and Looe.
It is the southernmost railway line in the United Kingdom, and the westernmost in England. The line was fully completed in 1867.