By David Hoskin | Smiley's Provincial Park, Nova Scotia, Canada

By Dan Kulpinski | Bethany Beach, Delaware, USA

By Jelieta Walinski Ph.D | Medicine Rock State Park

By Jelieta Walinski | Medicine Rock State Park, MT, USA

By David Hoskin | Morden, Nova Scotia, Canada

By David Hoskin | Morden, Nova Scotia, Canada

By David Hoskin | Morden, Nova Scotia, Canada

By David Hoskin | Morden, Nova Scotia, Canada

By Jelieta Walinski Ph.D | Medicine Rock State Park, Montana, USA

By David Hoskin | Morden, Nova Scotia, Canada

By David Hoskin | Halifax, Nova Scotia, Canada

By David Hoskin | Halifax, Nova Scotia, Canada

By David Hoskin | Halifax, Nova Scotia, Canada

By David Hoskin | Merrymakedge Beach, Kejimkujik National Park, Nova Scotia, Canada

By David Hoskin | Halifax, Nova Scotia, Canada

By David Hoskin | Halifax, Nova Scotia, Canada