O, whose name is pronounced the same way as "eau", (the French word for "water"), takes place in, around and above a 1.5 million-gallon pool of water, featuring acts such as synchronized swimming, aerial silks and fire dancing! Since opening in 1998, it has performed continuously to rave reviews, and has won various awards for technical excellence. If you are a fan of water acrobatics, this is the Cirque show for you!

Ka is the first Cirque du Soleil production that deviates from the company's usual format; this production presents a more linear form of storytelling, unlike the more abstract visuals presented by other Cirque shows. Two royal twins are separated by two groups of nefarious warriors; with the help of mysterious new friends on their respective journeys, the siblings battle their way back to each other and the safety of their home kingdom.