By David Brown | Bondurant, WY, USA

By David & Laura Dotson | Decatur Alabama USA

By David Moulton | Vernon, Utah

By David Norman | North Carolina USA

By David Mark Thompson | Rainbow Basin, San Bernardino County (western Mojave Desert), California

By David Proebstel | Hurricane Ridge near Port Angeles, WA

By David Shull | Elloree SC on Lake Marion

By David Hernly | Lake Washington, Melbourne Florida

By David Hughes | Paudo, above Bellinzona, Switzerland

By David H | above Bellinzona, Switzerland

By DAVID HUFFMAN | Erieau, Ontario, Canada

By David Tuttle | Mazomanie, WI

By David Hoskin | Halifax, Nova Scotia, Canada

By David Pinsky | Castaic CA USA

By P. David Myerowitz | Columbia Falls, MT near Glacier National Park

By David Genender | Cleveland Ohio. USA