The Menai Suspension Bridge, considered the world's first modern suspension bridge, connecting the Isle of Anglesey to the northwest coast of Wales, is opened.

The Menai Suspension Bridge is a suspension bridge spanning the Menai Strait between the island of Anglesey and the mainland of Wales. Designed by Thomas Telford and completed in 1826, it was one of the world's first major suspension bridges, and second such bridge designed to carry vehicular traffic, after the Union Chain Bridge (1820) across the River Tweed. The bridge still carries road traffic and is a Grade I listed structure.