By Sterling Johnson | Madison, Indiana, United States of America

By Abhijit Patil | Pinnacles National Park, California, USA

By Hassan Dadashi . arani | Hamadan province

By Judy Boyles | Whitehall, Montana, USA

By Karen Lagasse | Amarillo, Texas. United States

By Kannan A | Singapore

By Barry Medlin | Hahira, GA

By Mandy Daniels | Fuerteventura

By Hassan Dadashi . arani | Hamadan province

By Christine Bryant | Delhi, CA, USA

By Parker Chakales | Center Point, TX

By Andy Dungan | Near Cotopaxi, CO USA

By Andy Dungan | Near Cotopaxi, CO USA

By Chuck Reinhart | Vincennes, Indiana

By Mario Rana | Hampton, Virginia

By Cairbre Ó Ciardha | Ballyvaughan, Co. Galway, Ireland.