A broch is a type of ancient stone structure found primarily in Scotland. These round, tower-like buildings were constructed during the Iron Age, around 100 BC to 200 AD. Brochs are characterized by their thick walls, which often have a hollow interior and may include staircases and chambers. They were likely used for both defensive purposes and as living spaces. The most famous broch is Brodgar, located in the Orkney Islands. Brochs are significant archaeological sites, providing insights into the social and architectural practices of the people who built them. Their unique design has intrigued historians and archaeologists for many years.