Head South on the Florida Turnpike towards Homestead/Hwy US1. Take the Turnpike until it ends in Florida City and merges with Hwy US1. Keep heading South and count down the big green Mile Markers to #49 in Marathon, FL. If You hit the 7 Mile Bridge (or even Cuba), then you've gone too far!
For more info call 1-800-262-7284 or email firstname.lastname@example.org