The first roller coaster

http://www.essortment.com/all/historyrollerc_puc.htm

Every summer millons go to amusement parks for the best ride of all the rollercoaster,but were did it all start?Believe it or not, the first roller coaster was a hand-carved block of ice.In the 15th century in the frozen mountainous of Russia, the natives made the first amusement ride.Thuey wouldclimb smooth ice mountains paths that had no trees.Then they will break away the ice blocks.They would cover the icy seats with blanket and slide down.During the Mid 1800's a Pennsylavania coal mining company made a small gravity powered cart that was used on the railway to take coal to its destination.Roller coasters crashed after Wall Street crashed. they were reborn when Disneyland opened.Roller coasters are the safest rides in the amusment parks.In my Opinion I think sliding down a mountain is dangerous.How bored could they have been,but I am grateful for their idea of the rollercoaster.