Kasjan also made a major contribution to exploration of caves in the Aladaglar mountain ridge above the southern coast of Anatolia in Turkey, in the framework of the Call of the Abyss project. From 2002 to 2008 over 150 new caves were examined in the area, most notably Kuzgun cave, discovered in 2003, explored 400 m deep and in 2004 to its final (as of 2019) depth of 1400 m. In 2005, 2008 and 2013 three caves in the vicinity which could lead to greater depth were examined, 900 m deep side branch in Kuzgun was explored and engineering works at the cave bottom, which would stabilize loose collapse, were undertaken. In 2018 and 2019 Kasjan lead expeditions to new caves in the neighbouring area, also as part of the project.