Polka Marina is a Merry-go-round in amusement park Efteling in the Netherlands. It started operating in 1984.
Polka Marina is actually a combination of a carousel and a mini-roller coaster, since the Cogs are circling up and down on a Vekoma coaster track.
The diameter of the track is 18 meters, with 23 Cogs riding the track. In the center of the ride an 8 meter high whale fountain propels a pirate into the air