The beaches on the Florida Keys are all manmade, so not all waters shine equally. But we've found our favorite places to take a dip and get some much-needed vitamin D, from Key Largo to Key West. Take a look at these gorgeous beaches on the Florida Keys and see for yourself! The 311 rooms of the Casa Marina Resort have a light, sophisticated, but still island-y feel. The resort's grounds are beautiful, with palm trees and lush foliage, and lead to a rare amenity in Key West -- a swimmable beach.