By Peter Lowenstein | Mutare, Zimbabwe

By Nicholas Holshouser | Blue Ridge Parkway Milepost 420

By Samir BELHAMRA @Grafixart_photo | Namibia

By Melissa Gordon | Santa Rosa, CA, USA

By Erik Steiniger | Spartanburg, SC

By Ragini Chaturvedi | Freehold, NJ,USA

By Victor C. Rogus (FRAS) | Sedona, Arizona

By Russ Adams | Pike Co. IL.

By Marcia Bower | Syracuse NY

By Radu Anghel | Bacau, Romania

By Mark Fethney | Liverpool, UK

By Victor C. Rogus (FRAS) | Sedona, Arizona

By Dr Ski | Valencia, Philippines

By Dr Ski | Valencia, Philippines

By Sarah Paul | Newport, Gwent, Wales, UK

By Kendall Nelson | Staunton River State park, VA