Monument of nature is a rather small unaltered or partially altered natural spatial unit, site or phenomenon, physically clearly expressed, recognizable and/or unique, of representative geomorphological, geological, hydrographic, botanical and/or other traits, as well as a botanical value of scientific, aesthetic, cultural or educational importance, which has been formed by human activity.

Monument of nature can be of geological (historical-geological-stratigraphic, paleontological, petrological, sedimentological, mineralogical, structural-geological, hydrogeological and other), geomorphological, speleological (cave, pit and other), hydrological (whole or part of watercourse, waterfall, lake, mire and other) and botanical character (rare or significant plant specimen, single tree or group of trees, tree avenue, park, arboretum, botanical garden, etc).

All works and activities that might adversely affect the features and values of a monument of nature are prohibited.

Measures for the protection of monuments of nature and the manner of their use are more precisely defined by the act on the designation of a protected area.