Underneath the railway bridges across the Thames at Moulsford. Isambard Kingdom Brunel designed the bridge on the right for the opening of the Great Western Railway in the 1840s. Two additional trackw were added in the 1890s so a second bridge was added on the left, the up stream side. Safety walkways and access were added between them about 100 years later.
<a href="//commons.wikimedia.org/wiki/User:Geof_Sheppard" title="User:Geof Sheppard">Geof Sheppard</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>