The most beautiful corner of Crystal River — impossibly clear turquoise water ringed by an accessible boardwalk. Park at the Visitors Center and take the short trolley over (there's no parking at the springs). From mid-November to March, you'll look down on hundreds of manatees resting in the warm water below. Pair it with an in-water tour on Kings Bay: swim with them in the morning, see the whole gathering from above in the afternoon.