1966, to San Remo in Italy was our first holiday abroad. Not sure of the ins & outs, but it involved flying with British Eagle Heathrow - Luxembourg & a 24 hour coach ride, through France & Switzerland to get there. I had my first taste of proper foreign food, when presented with spaghetti bolognese & one of the waiters patiently taught me how to "twirl" it using a spoon & fork
One of day trips was popping over the border to the French Riviera & Monaco.