Drop by the Visitor Center to see exhibits and displays, a museum and non-profit bookstore, plus pick up a map guide. Ranger-led, 20-30 minute-long tours begin at the center and take you to the parks historic sites. Admission is free. Non-educational guided tours are available for 10 or more at $2 per person. A quick tip: Just after sunrise, you might be able to see black tipped reef sharks just off shore of the historical site with as many as 20 sharks on a good day.