What is the landmark building of the US 1962 World Expo?

Space needle tower? (English:? Space? Needle)? It is a major landmark in the Pacific Northwest, located in downtown Seattle, Washington. It was built because of the 1962 World Expo, when about 20,000 people used elevators to climb the tower every day; The Expo has 2.3 million visitors. At present, it belongs to private industry. The space needle tower is184m (6 10/0ft) high, 42m (138ft) at its widest point and weighs 9550 tons. It can resist strong winds with a speed of 320 kilometers per hour and earthquakes with magnitude of 9. 1, and 25 lightning rods are resistant to electric shock.

The main facilities of the Space Needle Tower are on the sightseeing floor 159 meters above the ground, such as Sky City Restaurant and Observation Deck. Standing at the top of the tower, you can see not only the whole downtown Seattle, but also the Olympic Mountain, Cascade Mountain, Mount Rainier, Iliad Bay and its nearby islands. The space needle tower is shorter than many buildings in the same area, but it often appears in a prominent position in Seattle photos. This is because the space needle tower is more than one kilometer away from these buildings. When the photographer takes pictures, the space needle tower is in front of those buildings, so it is higher than other buildings when looking down (generally, the photos are projected from north to south, so they are projected to the space needle tower, the city center and Mount Rainier). Many tourists who come to Seattle for the first time will be surprised when they go to the Space Needle Tower, because this 60-story building is really not too high and far from the city center. The view from the top of the tower is average. Visitors can take the elevator with a speed of 16 km to the top of the tower, and the whole journey takes about 43 seconds. Sometimes, because there are so many visitors, you have to wait in line for about an hour to get in.