Switzerland's second-most populous city, Geneva is situated where the Rhone River exits Lake Geneva, and is surrounded by picturesque snow-capped mountains. Geneva is a global centre of international business and international diplomacy, hosting the headquarters of the Red Cross and many agencies of the United Nations. Geneva International Airport is a major hub for EasyJet Switzerland, who connects the city to destinations throughout Europe with flights to Amsterdam, Barcelona, Berlin, London, Madrid, and Paris. There are in fact a large choice of carriers offering flights to the city, compare prices online to find the best cheap flights. As a low-cost carrier, EasyJet is always a good option for getting cheap flights from Bristol and other UK airports, but make certain to book in advance to improve your chances. One of the city's most enduring tourist attractions is the monumental Jet d'Eau, a fountain that pumps water 140 metres into the air. The Jet d'Eau is a breathtaking sight, and is perhaps best viewed from a safe distance; after all, the surrounding half kilometre is splashed with water. For those who are adventurous enough to climb the many steps of the towers, the Cathédrale St-Pierre provides magnificent views of the city and the glistening lake below. Beneath the cathedral there is an outstanding archaeological tour that presents the history of the the city dating back to pre-Roman times. On the ground floor of the Maison Mallet is the International Museum of the Reformation, which documents both the spiritual and cultural development of the reformation. The museum contains a vast selection of rare books, manuscripts and engravings, in addition to films and other interactive multimedia.