Each year Prof. Engel takes a trip around the sun.  He also can be found traveling in...
(listing incomplete for travel prior to 2007)
2015 
SW Saudi Arabia - January 2015
 
2014
Germany? - Autumn 2014
Namibia? - November 2014
SW Saudi Arabia - October 2014
Argentina? - September, 2014
North Carolina, USA - August 2014
France?- July 2014
New York, USA - June 2014
Missouri, USA - May 2014
Oklahoma, USA - May 2014
Nanjing, China- March-April 2014
Khartoum, Sudan - January 2014
Addis Ababa, Ethiopia - January 2014
 
2013
Missouri, USA - December 2013
California, USA - October 2013
Missouri, USA - September 2013
Heredia, Costa Rica - August 2013
Salvador, Brazil - August 2013
Brasilia, Brazil - July-August 2013
Hawaii, USA - July 2013
Wisconsin, USA - May 2013
SW Saudi Arabia - April 2013
Beirut, Lebanon - April 2013
California, USA - March 2013
Göttingen, Germany - March 2013
 
2012
Missouri, USA - December 2012
New York, USA - December 2012
North Carolina, USA - November 2012
SW Saudi Arabia - May 2012
Lima & Cuzco, Peru - May 2012
Quito, Ecuador - April 2012
Galapagos Islands, Ecuador - April 2012
Guayaquil, Ecuador - April 2012
 
2011
Missouri, USA - November 2011
New Jersey, USA - October 2011
Missouri, USA - September 2011
Riyadh, Saudi Arabia - September 2011
Minnesota, USA - August 2011
Svalbard, Norway - July-August 2011
New York, USA - June 2011
Michigan, USA - June 2011
Texas, USA - June 2011
Vermont, USA - March 2011
Vieques Island, Puerto Rico - February 2011
Gujarat, India - January-February 2011
 
 
2010
New York, USA - December 2010
Wisconsin, USA - November 2010
Alabama, USA - October 2010
Prague, Czech Republic - September 2010
Beijing, China - August-September 2010
Brisbane, Australia - June 2010
Sydney, Australia - June 2010
Cairns, Australia - June 2010
 
2009
Vermont, USA - August 2009
London, UK - May 2009
Vermont, USA - March 2009
Rajastan, India - January 2009
Dehra Dun, India - January 2009
Gujarat, India - January 2009
New York, USA - January 2009
 
2008
Kruger, South Africa - July 2008
Durban, South Africa - July 2008
Cape Town, South Africa - July 2008
Oklahoma, USA - May 2008
Illinois, USA - February 2008
 
2007
Turin, Italy - November 2007
New York, USA - July-September 2007
Washington DC, USA - July 2007
Andalusia, Spain - June 2007
Vitoria, Spain - May 2007
New York, USA - January-April 2007
 
2006
New York, USA - October-December 2006
London, UK - June 2006
 
2005
Washington DC, USA - April 2005
Pretoria, South Africa - February 2005
 
2004
Amsterdam, The Netherlands - November 2004
Leiden, The Netherlands - November 2004
Utrecht, The Netherlands - November 2004
Virginia, USA - October 2004
London, UK - June 2004
London, UK - February 2004
 
2003
Dresden, Germany - September 2003
London, UK - August 2003
2002
London, UK - July 2002
Moscow, Russia - July 2002
Turkey - May-June 2002
2001
Montana, USA - April 2001
Hamburg, Germany - March 2001
 
2000
Paraguay - August 2000
Brazil - August 2000
London, UK - August 2000
Kyrgyzstan - July-August 2000
Pennsylvania, USA - March 2000
 
1999
Stockholm, Sweden - November 1999
London, UK - July 1999
Brussels, Belgium - July 1999
Berlin, Germany - July 1999
Adelaide, Australia - January 1999
 
1998
Adelaide, Australia - December 1998
 
1997
Israel - March 1997
 
1996
Paris, France - September 1996
Brussels, Belgium - September 1996
London, UK - September 1996
Florence, Italy - August 1996
Panama - June-August 1996
 
1989
Salzburg, Austria - July 1989
Munich, Germany - July 1989
Paris, France - July 1989
London, UK - July 1989
 
1986
Seoul, South Korea - August 1986
China - August 1986
Macau - August 1986
Hong Kong, UK - August 1986
Tokyo, Japan - August 1986