Monday, August 10, 2015

Saturday, March 15, 2014

Thursday, September 05, 2013

Copper




Copper sheet from the White Pine Mine, Keweenaw Peninsula, MI, USA on display at the National Museum of Natural History

Saturday, January 02, 2010

Saturday, December 05, 2009

Wettsteinbrücke

in Basle (47°33′23″ N, 7°35′46″E)


view to the Mittlere Brücke


Sunday, June 14, 2009