Nairobi several international companies and organisations. In 2007, General Electric, Young & Rubicam, Google, Coca-Cola, IBM Services, Airtel, and Cisco Systems relocated their African headquarters to the city. The United Nations Office at Nairobi hosts UN Environment and UN-Habitat headquarters. Several of Africa's largest companies are headquartered in Nairobi.Safaricom,the largest company in Kenya by assets and profitability is headquartered in Nairobi, KenGen, which is the largest African stock outside South Africa, is based in the city. Kenya Airways, Africa's fourth largest airline, uses Nairobi's Jomo Kenyatta International Airport as a hub. Nairobi has not been left behind by the FinTech phenomenon
Nairobi and gurdwaras within the city. Prominent places of worship in Nairobi include the Cathedral Basilica of the Holy Family, All Saints Cathedral, Ismaili Jamat Khana, and Jamia Mosque. Nairobi has two informal nicknames. The first is ""The Green City in the Sun"", which is derived from the city's foliage and warm climate. The second is the ""Safari Capital of the World"", which is used due to Nairobi's prominence as a hub for safari tourism. There are a number of shopping malls in the Nairobi Area. These include: Garden city mall, Thika road mall (TRM), the West Gate mall, Prestige Plaza,