Disney Cruise Line’s Castaway Cay

Construction projects are under way on Castaway Cay with changes to the dock, including extending a rock barrier that protects the ships.  (Dewayne Bevil / Orlando Sentinel)

Some days there are no cruise-ship visitors to Castaway Cay. Lounge chairs and umbrellas await passengers on Serenity Bay, the beach for adults-only. Four of the private cabanas will be placed along this stretch.  (Dewayne Bevil / Orlando Sentinel)

The blue-blue-blue view from Serenity Bay, one of the beaches on Castaway Cay.  (Dewayne Bevil / Orlando Sentinel)

A wooden bird stands guard on Pelican Point, which reaches into Castaway Cay’s lagoon. This deck will overlook the new floating Pelican Plunge slides that are part of the expansion of island amenities.  (Dewayne Bevil / Orlando Sentinel)

It’s not all water and beaches at Castaway Cay. Hiking and bike trails can lead to an observation tower with a perspective of the flora of the island. About 10 percent of the island’s 1,000 acres have been developed by Disney.  (Dewayne Bevil / Orlando Sentinel)