Scotland is rich with prehistoric monuments & world famous, ancient built heritage. Over 2,000 castles have been built with over 900 still standing. The Knap of Howar farmstead, built 3,700 BCE is the oldest house in Western Europe. Nearby is Europe's best preserved Neolithic village, Skara Brae which was built 3,180 BCE.
The brochs at Glenelg are over 2,000 years old while the round tower of Brechin Cathedral was built over 1,000 years ago. The oldest building in Edinburgh is St. Margaret's Chapel, a mere youngster built in 1130.