I remember about 15 or so years ago I was walking along Pattaya beach road. The day before there had been a big swell on the sea.
Along the length of the beach on the waterline there was a pile of garbage washed up about 1.5 foot high and 3 or 4 foot in width.
I remember watching one of the beach vendors trying to push it back into the sea with the back of a rake.