Within the country of Ethiopia, some seriously old megalithic ruins can be found.
For example Tiya, located in the Soddo Region of Ethiopia. An archaeological marvel, which is an UNESCO World Heritage Site, remarkable for its large stone pillars.
Imagine the surprise of initial explorers when they stumbled across an entire church, in the shape of a templar cross, completely carved out of the ground.
Made of a type of volcanic tuff, it is known as the church of st George, and is largely thought to have been constructed around 1200 AD, yet, alas, no one really knows. The Church of St. George is one of eleven monolithic churches in Lalibela, a city in the Amhara Region of Ethiopia.