The Phantom Boomerang
Boomerangs are everywhere these days but in 1984 they were new and interesting. There is some confusion as to which was the first boomerang although I think its generally accepted the first to be built was at Rafaela Padilla in Mexico but the first to actually open was at Bellewaerde in Belgium. Two more also opened that year at La Ronde and Moreys Pier but a little known 5th ride was also built at Tivoli Park in Gran Canaria and possibly would have opened before Bellewaerde. Although that would have relied on it ever being finished.
The boomerang at Tivoli can be seen here in front of the Ferris Wheel.
Tivoli had a troubled history and was originally due to open 1974 but failed to open due financing problems. Several attempts were made to finish the park all he way into the 2000s until what was there was finally demolished in 2013. Source:
http://www.parqueplaza.net/2013/08/las-palmas-de-gran-canaria-derriba-un.html
Now in relation to the boomerang this is where things get murky. One of those attempts was in the early 80s and the picture above shows both the Ferris Wheel and the Boomerang at the park. The Ferris Wheel is also of Vekoma origin and is in fact still operating as Grande Roue at La Ronde in Canada. There is no date on the photo above but Grande Roue opened in 1984 meaning this picture must have been taken at the latest in early 1984.
The Boomerang that was there was also dismantled at the same time as the Ferris Wheel and promptly vanished too. There are many theories as to where it went. I've read it went to Parque de Atracciones in Barcelona before it went to Six Flags New Orleans to learn to snorkel but that leaves a 6 year gap between parks which seems unlikely. My personal theory is that this went with the Ferris Wheel and is what ended up as Boomerang at La Ronde, It wouldn't be the first time a ride company has sold a New Ride which Isn't really that "New".
The problem here is that no one at Vekoma now worked at Vekoma then. And even if they had I doubt records would have been was well kept as they are now. While its not really important it is a nice little historical mystery that I like.