Nairobi fought fiercely to save the indigenous Karura Forest in northern Nairobi which was under threat of being replaced by housing and other infrastructure. Nairobi's western suburbs stretch all the way from the Kenyatta National Hospital in the south to the UN headquarters at Gigiri suburb in the north, a distance of about . The city is centred on the City Square, which is located in the Central Business District. The Kenyan Parliament buildings, the Holy Family Cathedral, Nairobi City Hall, Nairobi Law Courts, and the Kenyatta Conference Centre all surround the square. Under the Köppen climate classification, Nairobi has a
Nairobi passengers from Syokimau to the city centre cutting travel time by half. Opening of the station marks the completion of the first phase of the Sh24b Nairobi Commuter Rail Network that is geared at easing traffic congestion in Nairobi, blamed for huge economic losses. Other modern stations include Imara Daima Railway Station and Makadara Railway Station. The new Mombasa-Nairobi Standard Gauge Railway connects the port city of Mombasa and Nairobi. The new railway line has replaced the 1900 metre-gauge railway. The Nairobi Terminus is located at Syokimau, some 20 km from the city centre. Passengers travelling from Mombasa are usually