Atop the Pyramid of the Sun, Teotihuacán (Mexico, May 2009)

Rest break while climbing the Pyramid of the Sun, Teotihuacán (Mexico, May 2009)

Crossing requires caution (Iceland, July 2008)

Rainbow at Gullfoss (Iceland, June 2007)

People power (Iceland, June 2007)

All done up (United States, March 2007)

Strange warning sign (Sweden, March 2005)

Almannagjá, the space between the tectonic plates (Iceland, May 2004)