Knockmany

Knockmany passage tomb, or Anya's Cove, is an ancient burial monument on the summit of Knockmany Hill, near the village of Augher in County Tyrone, Northern Ireland. It is the remains of a Neolithic passage tomb and its stones are decorated with rare megalithic art. They are protected by a concrete chamber and mound, built in 1959 by the Department of the Environment, roughly resembling the mound that would have originally covered it. The stones can be viewed through the entrance gates. It is a monument in state care.

Source: Wikipedia