(February 14, 2024) While burial mounds exist all around the world, those with temporarily accessible tombs inside mimicking caves and having ritual spaces outside are called barrows. They are most prominent in Druid culture. Barrows can be circular or be a long oval. All have some sort of central chamber and many have a ritual site outside their entrance where the powers of the ancestors can be called upon.
Often these sorts of mounds would be surrounded by square stone slabs which in turn gave rise to stone henges which represented connections to ancestral powers often associated with death. Wood henges derive from observatories and had a different function of connecting to life powers and or astrological powers.