Swimming was originally allowed, but has since been prohibited for safety reasons due to the operation of the rental boats and the existence of a single-cell amoeba Naegleria fowleri identified in the water that has been credited with several illnesses and at least one death.

The island of Castaway Cay is currently used as the launching point for perimeter fireworks within special events and holidays at Magic Kingdom Park.

What would become the lagoon was originally conceived as home to various themed resorts which were relatively landlocked which would be separated from the Magic Kingdom by golf courses, an ice rink and a rollerskating dome.

Original plans showed the monorail terminating in front of the Magic Kingdom entrance on a linear route with three WEDway People Movers lines connecting guests to the various resorts.

The revised plans would see the monorail circle the lagoon with parking and a transportation center built on the South shore connecting the various resorts.

The show included eight-person, three-tiered pyramid, an exposition of flex-wing kite flying at 300 feet over the water and a series of jumps over a five and one-half foot ramp.

At around 9:15 p.m. on June 14, 2016, a two-year-old boy wading in the Seven Seas Lagoon at the Grand Floridian Resort & Spa was grabbed and mauled to death by an alligator.

[6] The boy's intact body was discovered at the bottom of the lagoon at approximately 1:45 p.m. the following afternoon; he was found near where he went missing 12 to 15 yards (11 to 14 m) from the shore in about 6 feet (1.8 m) of water.

Reuters reported that the resort would put up signs warning guests about alligators and five of them were earlier killed in the search, to examine their stomachs.