Sacred groves or sacred woods are groves of trees that have special religious importance within a particular culture. Sacred groves feature in various cultures throughout the world.
They were important features of the mythological landscape and cult practice of Celtic, Estonian, Baltic, Germanic, ancient Greek, Near Eastern, Roman, and Slavic polytheism; they also occur in locations such as India, Japan (sacred shrine forests[1]), and West Africa and Ethiopia (church forests[2]). Examples of sacred groves include the Greco-Roman temenos, various Germanic words for sacred groves, and the Celtic nemeton, which was largely but not exclusively associated with Druidic practice.
During the Northern Crusades of the Middle Ages, conquering Christians commonly built churches on the sites of sacred groves. The Lakota and various other North American tribes regard particular forests or other natural landmarks as sacred places. Singular trees which a community deems to hold religious significance are known as sacred trees.