By David Hoskin | St. Croix, Nova Scotia, Canada

By Jelieta Walinski Ph.D | Medicine Rock State Park

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

By Jelieta Walinski Ph.D | Lake Hennepin, Northern Minnesota, USA

By Dan Kulpinski | Derwood, Maryland, USA

By David Hoskin | Halifax, 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 Jelieta Walinski | Lake Hennepin, Minnesota, USA

By David Hoskin | Halifax, Nova Scotia, Canada

By David Hoskin | Halifax, Nova Scotia, Canada

By Rob Ratkowski | Magnetic Peak, Haleakala Summit,Maui

By David Hoskin | Halifax, Nova Scotia, Canada

By Michael Skidmore | Ashland, Oregon, United States

By Michael Skidmore | Ashland, Oregon, United States