The most heavily populated city in Canada, Toronto is a vibrant, cosmopolitan, financial, commercial and cultural centre with a rich multi-cultural heritage of more than 80 ethnic groups, speaking more than 100 languages. It has a lively stock exchange, soaring futuristic architecture, museums, art galleries, performing arts companies, fine restaurants, large shopping complexes, a waterfront and hundreds of parks. The city is sited on the north shore of Lake Ontario, and sports distinctive neighbourhoods as well as the longest street in the world, Yonge Street, as its main north-south artery. Toronto’s main landmark is the CN Tower, which is the world’s tallest free-standing structure with glass-fronted elevators that rise 1,815ft (553m) to indoor and outdoor observation decks. The city also boasts the 'Skydome', which is a multi-purpose entertainment complex with a retractable roof, billed as the world’s greatest entertainment centre. In the 17th century Toronto was a small French colony; then came the American Revolution which encouraged scores of families whose loyalties lay with the British to flee north. Many settled beside the lake establishing a town known as York, which slowly grew in importance as an administrative and manufacturing centre. In 1834 the name was changed to Toronto, an Indian word meaning 'meeting place'. The new name proved worthy when about a century later the city's English character began to be buried beneath the conglomeration of cultures brought in by a massive tide of immigrants from all corners of the world. Old English pubs and Victorian and Edwardian architecture survive among the skyscrapers, but Toronto is today a lively and cosmopolitan city and Canada's commercial capital.