Brochs are ancient stone structures found primarily in northern Scotland. They date back to the Iron Age, around 500 BC to 200 AD, and are characterized by their thick walls and circular design. Typically, brochs are built using dry-stone techniques, meaning no mortar was used, allowing them to withstand the test of time. These structures served various purposes, including as dwellings, storage spaces, and possibly as defensive sites. The most famous examples of brochs include Gurness and Clickimin, which showcase the impressive engineering skills of the people who built them. Today, brochs are important archaeological sites that provide insight into ancient Scottish life.