Twice a day the tide comes in and goes out. On the Northumberland Strait, on the north shore of Nova Scotia, when the tide goes out there are sand flats left that stretch forever and allow easy walking. The red sand is characterisitic of that Shore and heats up during the day, as the tides allow, making for excellent swimming when the tide comes in. It is said that that water is "the warmest water north of the Carolinas!" Nature has provided man with a place where he can enjoy walking at low tide and swimming at high tide. Thank you Nature!!