The doubletree grand hotel biscayne bay is a waterfront luxury full service condo hotel in the heart of downtown miami florida and near key biscayne where the sony ericsson tennis tournament takes placeour biscayne bay hotel is located one block within walking distance from the miami passport agency and just one mile away from the port of miami which encompasses some of the most popular cruise ships such as royal caribbean carnival and norwegian cruise lines were also a favorite miami hotel