Tronto is one of the largest cities in Canada.It is loacated in the province of Ontario.A special feature of Tronto is the downtown area. Covering about 12 square kilometers where many shops and buildings are located underground.There are five major shopping centers and convention center with hotels.A subway and underground passageways connect these buildings with each other and the streets above.The architectual design is appropriate(気候に)ふさわしい and popular because of the weather conditions in Tronto.The temparture flactuates 変動するwidely from summer to winter.by as much as 40 degrees 40度も Celcius within a year.This underground area has also help to keep business in the city center,企業が中心部にとどまっています instead of moving out to the suburbs which is happening in many other cities.We thinks that makes Tronto a special place.