Djibouti is the capital and largest settlement in Djibouti, situated in the Horn of Africa. The city is located in eastern Djibouti, approximately  northwest of the Somaliland border. It is a seaport with the only sheltered harbour on the western side of the Gulf of Tadjoura. The wadi of Ambouli, flows through the city, separating the older parts of the city from the Balbala district. The landscape around the city, along with Djibouti's coastal lowlands, is either desert or semi-desert. The city's sandy beaches include Siesta Beach and Heron Beach.