Welcome to Gravity Gardens one of SixFlags Newest Space to have so mutch fun. It started 1960 as a small but great nature garden and year the Garden becomes bigger and bigger. The old Wooden TreeTop Flyer Coaster Closed 2016. The old coaster was in need of restoration and the effort was unfortunately too great so you thought you would use the new means to breathe new life into the coaster and the Treetop Flyer RMC Coaster was born with some new extensions.