Contributor Difshot created this stunning drone video of an important ancient site in Ireland called Loughcrew. Situated in County Meath in the eastern part of the island, the area is known for its hilltop tombs which sit atop a prominent hill. It's what is known as a passage tomb, one of four such sites identified in Ireland. The tombs date to the 4th millennium BC - over 5,000 years ago. The area including the tombs and the hill is known as Slieve na Calliagh, and it's a protected national site.