Single objects of animate and inanimate nature, or their clusters, of special environmental, scientific, cultural, historical or landscape value and of distinctive individual features such as trees of impressive size, native and alien bushes, sources, waterfalls, exsurgents, stones, ravines, erratic boulders and caves.

• Act of 16 April 2004 on Nature Protection
  Place of publication: (Dz. U. z 2023 r. poz. 1336, z późn. zm.)

• Protection of nature