Caving, Cavediving, Underwater- and Cave Photography, cave minerals
- Explored caves in Germany (Swabian Jura, Franken Jura, Reiteralm), Austria, France, Sweden, Switzerland, Turkey, USA, Mexico, Thailand, New Zealand.
- Leader of the Blautopf Exploring groupe from 2004-2008.
- Co-Producer of the film "Mythos Blautopf" in 2006
- Member of the film/photo jury at the IV. European Speleological Congress in 2008 in Lans-en-Vercors/France
- 2010 published 1 picture in the calendar of the ARGE Blautopf
- Co-author of the book "Faszination Blautopf" in 2009 and 2011
- 2011 published 3 pictures in the calendar of the ARGE Blautopf
- 2011 published 3 pictures in the english magazin "descent" No. 223