Reigate
... that the first road tunnel in England, opened in 1823 in Reigate, Surrey, runs under the site of a medieval castle?
... that the first road tunnel in England, opened in 1823 in <b id="mwBTs"><a href="./Reigate" id="mwBTw" rel="mw:WikiLink" title="Reigate">Reigate</a></b>, Surrey, runs under the site of a medieval castle?