Er-Rich El Kadim, or the Old Ksar, is the foundational heart and the living soul of Er-Rich's history. This historical landmark is a prime example of traditional Berber architecture, built with earth, stone, and wood (pisé), where its towering walls have withstood the test of time and climate for centuries. Walking through its narrow, covered alleys feels like a journey back in time, evoking the lifestyle of ancestors and a communal social system built on solidarity and security. The Ksar is distinguished by its unique defensive design, intricately decorated wooden doors, and small windows overlooking the nearby palm groves. Er-Rich El Kadim is not merely ruins; it is a visual and cultural memory of the trade caravans that once traversed the region. Today, it stands as an essential destination for anyone seeking to understand the deep roots of the Eastern High Atlas people and to admire the stunning contrast between its warm earthy tones and the lush greenery of the surrounding orchards.