They drove to Tywyn, a seaside resort on the Cardigan Bay, on the west coast of Wales. With them were Lennon's six-year-old son Julian and Ono's five-year-old daughter Kyoko Cox. They are pictured here in the rear garden of the Corbett Arms Hotel.
The visit was just days before the investiture ceremony held at Caernarfon Castle in north Wales for Charles, Prince of Wales, which took place on 1 July 1969.
The tourists sent a postcard, bearing the image of the 20-year-old prince, to Ringo Starr and his family, c/o Peter Brown at the Apple offices at 3 Savile Row, London. It contained the simple message: "Hello".
The postcard, bearing the postmark of Tywyn and dated 23 June 1969, was included in Starr's 2004 book Postcards From The Boys.