Source WIKIPEDIA:
The Royal border bridge is a 658 m long railway viaduct between Tweedmouth and Berwick-upon-Tweed. The railway crosses the mouth of the River Tweed in the North Sea it. The East Coast main line runs over 28 arches at a height of 38 m over the bridge, which symbolically marks the transition from England to Scotland with Royal approval. The current border crossing point is a few miles further to the North.

Designed and built the bridge headed by Robert Stephenson between 1847 and 1850, and in a decided ceremony was officially opened by Queen Victoria.

