It is _________________________.

Venice is a fascinating city between sea and sky. It is built on 117 islands. There aren’t any cars and buses, But it has 150 canals and 400 bridges. The narrow streets, with their historic names, are paved with stones but have no footpaths. They are lined with flower, shops and lights side by side. The squares are charming, The brick bridges are built high to; allow boats to pass tinder them.
   Every year thousands of tourists front the five continents visit this city. They are always amazed at the charm of her water and beautiful lights, which can make them free from all dust and cooled by the sea breezes.
   But because the level of the surrounding waters is constantly rising, the Venice faces a threat to its Very existence. And the Venetian love their city and want to stay there to save the Venice from the sea, Now various methods hove already been taken and a plan to protect the city is under investigation.
How many islands are there in Venice?