Maidenhead Sounding Arch

The brick arch that spans the Thames at Maidenhead is one of those structures you walk past dozens of times before actually stopping to look at it properly. Built in 1777, it's Isambard Kingdom Brunel's railway bridge - and it's genuinely remarkable if you know what you're looking at. The shallow, flat arches were controversial at the time. Engineers reckoned it would collapse under a train's weight. It didn't. It's still standing, still carrying trains, still impressing anyone who bothers to examine the engineering.

You won't spend hours here - it's a landmark to appreciate from the towpath or from the riverside, not a destination in itself. The Thames Path runs right past it, so it works brilliantly as a stopping point on a riverside walk between Maidenhead itself and Hurleyford Farm, which sits about five miles away. The arch is best viewed from the water or the southern bank. The brickwork is proper handsome up close, especially if you catch it in decent light.

For architecture buffs and railway history types, this is worth the detour. Kids might find it a bit "so what's a bridge, then" unless you get into the story of Brunel being told it couldn't work. Most visitors will slot it into a larger walk along the Thames - which is exactly how to approach it. Free to see, no restrictions, no gift shop. Just go.