Chellah is a medieval fortified Muslim necropolis and an ancient archaeological site on the south side of the Bou Regreg estuary in Rabat, Morocco. It is one of the most important archaeological sites in the country and was once home to a bustling city with a thriving trade industry. The archaeological remains of Chellah consist of a complex of walls and towers dating back to the 10th century, when the Wattasid dynasty founded the city. These structures include mosques and mausoleums in Morocco's earliest examples of Islamic architecture. Lush gardens and orchards once surrounded it, but these were destroyed by a severe drought in the 17th century. Chellah is also home to a vibrant array of wildlife, including many bird and mammal species. Visitors can explore the city's ruins, walk through its lush gardens, and marvel at ancient architecture. There is also a small on-site museum that highlights Chellah's importance in Morocco's history.