Whose tide is highest? Canadian towns battle it out over Guinness World Record title

For years Nova Scotia's Burntcoat Head Park claimed the superior tidal height, but now a challenger from the far north is seeking the crown

For visitors to Burntcoat Head Park in Nova Scotia, a scramble along the russet shoreline of the Atlantic Ocean is a pilgrimage to the site of one of the planet's great natural wonders.

Twice a day, more than 100bn tons of seawater fills and drains the Bay of Fundy - a figure comparable to the flow of all the world's freshwater rivers combined.