By Hassan Dadashi . arani | Esfahan . Iran

By Nina Gorenstein | West Lafayette, IN, USA

By Robin Magleora | Ormond Beach FL USA

By Michael Flynn | Klipstein Canyon S/W Kern,County,California USA

By Sudhir Sharma | Cliffs of Moher, Ireland

By Kathryn Soli | Denver, Colorado, USA

By Jeremy Likness | Hornbeck Homestead on Florissant Fossil Beds National Park, Florissant, Colorado

By Robin Magleora | Ormond Beach FL USA

By Andy Dungan | 10 mi N of Cotopaxi, CO USA

By Ernest Jacobs | Eden, NY 14057

By Alyssa Michaud | Orlando FL

By Diane Rains | Hudson WI USA

By Nina Gorenstein | West Lafayette, IN, USA

By Patricio Leon | Santiago, Chile

By Meiying Lee | New Taipei City, Taiwan

By Lisa Ann Fanning | Monmouth County, NJ