By Tawnya Silloway | Colorado Springs Colorado

By C. Gentile | Florham Park, NJ USA

By matthew chin | Hong Kong

By Jahnavi Rastogi | Princeton, New Jersey, USA

By Lorraine Boyd | Richmondville, New York

By Jeremy Likness | Newport, OR, USA

By Hassan Dadashi . Arani | Esfahan province. Iran

By James Gaulding | New Braunfels, Texas, U.S.A.

By C. Gentile | Florham Park, NJ USA

By Dolores Moreno | Highland, CA

By Patricio Leon | Santiago, Chile

By JOSE PALMA | Mina São Domingos ,Portugal

By Mohammed Abdallah | Suez, Egypt

By Mandy Daniels | Derbyshire, UK

By Kurt Messick | Grindavik volcano, taken from the top of Hallgrimskirkja church in Reykjavik

By David Hawkes | Sheffield