For about 200 years, thrill-seekers have loved roller coasters. The first one was the “Skywalk” that opened in Paris, France, in 1817. But most experts believe the amusement ride originated from attractions called Russian Mountains, which were popular in Russia in the 1700s. They were hills of ice up to 80 feet tall for riders to speed down on sleds. Today, most coasters are made of steel and feature twisting turns, huge loops, and incredible speeds. There’s plenty to celebrate on National Roller Coaster Day, on August 16!