The railway station at Clifton Down in Bristol is built below street level. The east end of the platforms are beneath this bridge, although a barrier stops passengers using this part of the station so it is just populated by pigeons today.
<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>