A Passage grave (sometimes hyphenated) or Passage tomb is a tomb, usually dating to the Neolithic, where the burial -- or burials -- are reached along a -- usually low -- passage. The name usually refers to a considerable subgroup of the Chambered cairns, but there are earthen Barrows which are effectively passage-graves as well.
Passage graves were usually constructed at the tops of hills or mountains, so that they could be seen from a great distance.
