The Gravesend - Tilbury ferry service is the last public foot crossing point before the Thames reaches the sea. Nobody knows how long a ferry service has been operating here, but its origins are believed to be early. A sketch map from 1571 shows evidence of two jetties and houses either side, so it was probably well established by then. Personally, with the two markets established in Gravesend by King Henry, you would think that some sort of ferry service would be in use transporting animals and wool to here for the markets and further afield. A car ferry service was introduced in 1927, but discontinued in 1964, following the opening of the first Dartford Tunnel in 1963. Today the ferry runs every 30 mins Monday to Saturday from 6am to 7pm.