By Mandy Daniels | Derbyshire, UK

By Frank Lu | Arlington, Texas, USA

By Hassan Dadashi.Arani | Esfahan province. Iran

By Thomas Jones | Cave of the Winds, Niagara Falls, NY

By Patricio Leon | Santiago, Chile

By Mario Rana | Hampton, Virginia

By Nina Gorenstein | West Lafayette, IN, USA

By Lou Musacchio | Montreal, Quebec, Canada

By Tana Congi | Ft. Stockton, TX

By Kevan Hubbard | Rochester,Northumberland National Park,England

By Filipp Romanov | Utah Desert Remote Observatory at Great Basin Desert, Beryl Junction, Utah, USA

By Hassan Dadashi.Arani | Esfahan province. Iran

By Victor Rogus | Sedona, Arizona, USA

By Mamta Patel | Scottish Highlands

By Tawnya Silloway | Mill Creek Colorado

By Anthony Grober | St Helens, Oregon, USA