Past Dates:
June 2014 - Peru
April 2015 - Guatemala
July 2016 - Norway
October 2016 - Dominican Republic
December 2016 - Chile and Antarctica
2017 - Denmark and Greenland
2017 - New Mexico
July 2018 - Norway, Germany and Austria
October 2018 - Utah
February 2019 - Colorado
April 2019 - South Carolina
June 2019 - France
June 2019 - Utah
August 2019 - Colorado
September 2019 - Yukon, Canada
October 2019 - Norway
December 2019 - Canary Islands and Sweden
January 2020 - Ontario, Canada
Future Dates:
February 2020 - Colorado