<P> The first modern roller coaster , the Promenades Aeriennes , opened in Parc Beaujon in Paris on July 8 , 1817 . It featured wheeled cars securely locked to the track , guide rails to keep them on course , and higher speeds . It spawned half a dozen imitators , but their popularity soon declined . </P>
<P> The first modern roller coaster , the Promenades Aeriennes , opened in Parc Beaujon in Paris on July 8 , 1817 . It featured wheeled cars securely locked to the track , guide rails to keep them on course , and higher speeds . It spawned half a dozen imitators , but their popularity soon declined . </P>
when was the first roller coaster built in the world
when was the first roller coaster built in the world
July 8 , 1817
July 8 , 1817