Located in Ankara, Turkey and a member of the Union of International Speleology. Promotes exploration and conservation. Includes meeting and contact information. [Turkish and English].

ISSA's aim is to promote the artistic interpretation of caves and karst landscape. Membership, galleries, contact, activity and background information.

Representing cavers from around the world with working groups devoted to protection and management, research, documentation, exploration and education. Includes calendar, abstracts, vacancies, history, guidelines and standards.

Crew is dedicated to exploration, surveying and preservation. Includes trip reports, field notes, databases, photos and contacts.

To facilitate the systematic collection and responsible use of cave, karst and related data on an international basis.