SPELEO  
   Hellenic Speleological and Exploration Club located in Athens. Devoted to exploring, mapping, studying, photographing and protecting caves. Includes meeting information, expeditions, seminars, photos and contacts.
   http://www.speleo.gr/en/prologos_en.html

Hellenic Speleological Society  
   Founded in 1950 and is a member of U.I.S. and S.F.E.C. Dedicated to scientific study of karstic forms. Offers seminars to teach exploration, cartography, rescue operations and photography. Includes activity schedule and contact information. [Greek and
   http://web.otenet.gr/ellspe/indexen.htm