The 76m-high Clifton Suspension Bridge that spans the Avon Gorge was designed by master engineer Isambard Kingdom Brunel, with construction beginning in 1836. It's free to walk or cycle across; car drivers pay a £1 toll. The visitor center at the bridge's western end is worth exploring.
The free bridge tours are excellent, as are the two-hour Hard Hat Tours, which go inside one of the massive supporting towers (£14; book).
Although initially designed to carry light horse-drawn traffic and foot passengers, these days the bridge carries around 12,000 cars every day – testament to the vision of Brunel's design.
