North America | 1989 +

Ketchikan, Alaska

Europe | 2003, 2010, 2011

St. Petersburg, Russia

South America | 2013

Salt Flats of Uyuni, Bolivia

Antarctica | 2013

Antarctica

Australia | 2014

Sydney, Australia

Africa | 2016

Cape of Good Hope, South Africa

Asia | 2017

Koh Samui, Thailand