Wedge tombs are the most numerous megalithic tomb type in Ireland, built from large stone slabs arranged into a roughly trapezoidal gallery that is wider and taller at the entrance end and narrows toward the back, like a stone wedge driven into the ground. They tend to face the setting sun, westward or south-westward, and are found in particularly high concentrations across the Burren and the broader west of Ireland, where flat limestone pavements made suitable building material both plentiful and accessible.