Modern geography is based on ecological thinking. In this paper some geoecological notions are discussed: the scales and levels regarding spatial magnitude and complexity, the "hierarchy" of landscape units and especially the scale of time and the concept of the superimposing "stamps". This last mentioned concept is very important in relation to the problem regarding regionalization and its possibilities.Three "stamps" are recognized: 1. the substrate, 2. the climatic conditions, 3. the human (no6tic) influence. Holistic regionalization in which all elements (including the human influences) are telling to full advantage, is unsatisfactory.