TIL that Roller Coasters have their origins in 1700s Russia with 'Russian Mountains' which used gravity to rapidly propel sledders over several hills of ice during the winter.

https://en.wikipedia.org/wiki/Roller_coaster
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gvbxyp/til_that_roller_coasters_have_their_origins_in/