If your trip to Key Biscayne is all locked in but your itinerary is a bit on the empty side, let us give you a helping hand.Give that rental car a breather and exercise those legs. Not far from the center of this neighborhood, Crandon Park is worth a visit. More adventure awaits at Rickenbacker Causeway Beach and Crandon Golf at Key Biscayne, which are also a stone's throw away.