Per the Hilton website ( http://www.hilton.com/hotels/EYWKWHF....html?show=all ):

For those looking for a day at the beach Hilton Resort guests are permitted access to the very exclusive Sunset Key Resort, a tropical island retreat just minutes by launch from the Hilton Marina. For a nominal service fee, guests can enjoy a tranquil white sand beach complete with lounge chairs, a tiki bar, waterfront restaurant and beautiful views of the surrounding blue seas.


Sunset Key, located 100 yards off the coast of the resort, provides tranquil beach area, totally secluded from the rest of Key West with our private guest cottages.


The resort's water launch will continuously shuttle our guests to the island of Sunset Key. One day passes for Sunset Key Beach can be purchased at the Hilton's Concierge Desk and they cost $10.00 per adult. (When accompanied by an adult, Children under 18 are free.) Guests enjoy the feeling of being swept away to a lush tropical island with a white sand beach. Beach attendants will pamper you while you enjoy the tropical breeze and pristine waters so your island state of mind is left undisturbed.

See the picture at http://www.hilton.com/hotels/EYWSKHF....html?show=all