Passengers aboard the Harmony of the Seas experienced an unexpected waterfall after the ship did a hard-turn to avoid a raft in the sea and water from a pool began spilling onto a lower deck.

As can be seen in the photos above, Harmony also is home to a multi-deck water slide area, something Royal Caribbean has just begun adding to ships this year. It's also the first Oasis class ship ...

Harmony also will be the first Oasis class ship with a Bionic Bar where the drinks are served by robot bartenders -- a concept that first debuted in 2014 on Royal Caribbean's Quantum of the Seas.

A picture taken on May 12, 2016 at the STX shipyard of Saint-Nazaire, western France shows the auditorium inside the Harmony of the Seas cruise ship during the delivery ceremony of the boat.

The Harmony of the Seas is currently being built at the STX shipyards in France near St. Nazaire. With the initial phase of exterior construction finished, the ship was floated out to the dry dock ...