Rossall Beach, Cleveleys, Lancashire, UK. 

Mary’s Shell can be found on the beach at Cleveleys which is just north of Blackpool, England. It is 8m long, 4m tall and weighs in at 16.5 tonnes, with words from the story of the Sea Swallow etched inside. The story tells a fairy tale that blends legend with local features, including sunken villages and the petrified forest which you can still see on the beach today.