The most famous landmark, which became the symbol of the city, is the  obelisk of the National Monument (''Monumen Nasional'' or ''Monas'') in the centre of Merdeka Square. On its southwest corner stands a Mahabharata-themed Arjuna Wijaya chariot statue and fountain. Further south through Jalan M.H. Thamrin, one of the main avenues, the ''Selamat Datang'' monument stands on the fountain in the centre of the Hotel Indonesia roundabout. Other landmarks include the Istiqlal Mosque, Jakarta Cathedral and the Immanuel Church. The former Batavia Stadhuis, Sunda Kelapa port in Jakarta Old Town is another landmark. The Gama Tower building in South Jakarta, at 310 metres, is the tallest building in Indonesia.