Venice has a main canal 4 kilometers long and 30 60 meters wide, which is connected with 177 tributaries. The whole city consists of 118 small islands. There are more than 2,300 lanes in the city. Venice's houses are uniquely built, and the foundations are submerged in the water, as if they were drilled out of the water. The Venice Grand Canal is known as the Water "Champs Elysees" Avenue in Venice. On both sides of the river, there are various ancient buildings, including Rococo palaces, Moorish houses and, of course, many magnificent Baroque and Gothic churches. During the Renaissance, many great artists left immortal murals and oil paintings in these churches, which still attract numerous tourists and artists from all over the world. In addition, stores, markets and banks across the canal have added endless vitality to the waterborne metropolis.