Exhibition Place is a rectangular site located length-wise along the north shoreline of Lake Ontario to the west of downtown Toronto. The site is mostly flat ground sloping down gently to the shoreline. It was originally forested land, and was cleared for military use. Sections east of Stanley Barracks and south were filled in the early part of the 20th century. Today, the district is mostly paved, with an area of parkland remaining in its western section. There is a large open paved area in the southern central section, which is used for parking and the temporary amusements of the Canadian National Exhibition (CNE). The site has a variety of historic buildings, open spaces and monuments. The eastern entrance to Exhibition Place is marked by the large ceremonial Princes' Gates, named for Edward, Prince of Wales, and his brother, Prince George, who visited in 1927. The roads are all named after Canadian provinces and territories except for Princes' Boulevard which is the main street east-west. Several of the roads are used for the annual Honda Indy Toronto car race. South of the grounds is Ontario Place, a theme park built in 1971 on landfill in Lake Ontario, and operated by the government of Ontario.