U.S. News Insider Tip: In addition to seeking sea shells during a walk on the beach, keep an eye out for fossilized sharks' teeth, which vary in size and blacken over time. – Susan B. Barnes If you're ...

U.S. News Insider Tip: Get up close and personal with sea turtles through the Mote Marine Laboratory & Aquarium's Turtle Time animal encounter, available Sunday and Thursday mornings. – Susan B.