The Opera house Sydney
The Opera house in Sydney, the oldest and biggest city in Australia, is very interesting and famous building. The building is near sea. The Opera house was designed by young Danish architect Joern Utzon. Its design looks like sails of a ship in the wind. It took 16 years to build that sails. The Opera house was opened in October 1973 by Queen Elizabeth II. From 1973 have Opera house visited more than 36 million people. Every year is in Opera house more than 2500 operas, concerts of popular music and theater plays.

Nuclear Weapons
In my opinion we can consider nuclear weapons for one of the wonders of the modern world. Because if only USA invented nuclear weapons, they would bombard USSR and they would destroy the world and if USA didn’t invent nuclear weapons they wouldn’t defeat Japan in Second World War. So the great states must have nuclear weapons because they have to show their power to other states and they don’t attack them and than there will be no wars (perhaps anymore). We can use nuclear weapons to destroy an asteroid that can destroy the Earth as in the movie Armageddon too. In the future we can use them against aliens if we discover them.