Giannis Skoulas primarily documents the historical heritage of Greece through photography. Six photographic albums and monographs of his have been published, including Lighthouses, Stations, Vintage Cars and Ancient Crete, among others, and he has contributed to another twenty publications. He has presented twenty-one solo exhibitions in Greece and abroad and has participated in thirteen group exhibitions. For two decades he photographed dance ensembles at the Odeon of Herodes Atticus as well as jazz musicians. He has published dozens of articles on travel and research topics, has photographed more than one thousand archaeological sites and undertook the photography for the reinstallation of the Archaeological Museum of Ancient Corinth. Since 2009 he has been researching, documenting and photographing the remains of the three successive borderlines between Greece and the Ottoman Empire, with publications and conference participations. His works are included in private collections in Greece and abroad, in embassies and hotels, and have been issued as postage stamps by the Hellenic Post. His photographs have been used in books and music albums. He worked as a photographer for the Greek National Tourism Organisation and has been a member of the Chamber of Fine Arts of Greece since 1996.