In the film "Summer Holiday" what is the eventual destination that the bus is travelling to?

"Summer Holiday" is a British CinemaScope and Technicolor musical film featuring singer Cliff Richard. The film was directed by Peter Yates (his debut), produced by Kenneth Harper. The original screenplay was written by Peter Myers and Ronald Cass (who also wrote most of the song numbers and lyrics). The cast includes Lauri Peters, Melvyn Hayes, Teddy Green, Jeremy Bulloch, Una Stubbs, Pamela Hart, Jacqueline Daryl, Lionel Murton, Madge Ryan, David Kossoff, Nicholas Phipps, Ron Moody and The Shadows.

The story concerns Don (Cliff Richard) and his friends (Hayes, Green and Bulloch) who are bus mechanics at the huge London Transport bus overhaul works in Aldenham, Hertfordshire. During a miserably wet British summer lunch break, Don arrives, having persuaded London Transport to lend him and his friends an AEC Regent III RT double-decker bus (and not a later AEC Routemaster as often quoted). This they convert into a holiday caravan, which they drive across continental Europe, intending to reach the South of France. However, their eventual destination is Athens, Greece.

On the way, they are joined by a trio of young women (Stubbs, Hart and Daryl) and a runaway singer (Lauri Peters), who initially pretends to be male, pursued by her mother (Ryan) and agent (Murton). The movie was a box-office hit, thus repeating the success of Cliff Richard's earlier film "The Young Ones" (1961).