I'm in the Florida Keys (at Long Key State Park, which I highly recommend. I can reach my hand out of my tent and touch the Atlantic, or the Caribbean or whatever it is. The people in the campsite next to me are driving the Live Ligthly Tour RV) and coming down I could see construction going on on the Florida Keys Overseas Heritage Trail. Where it is in place, it's pretty cool.
Some day, it will be a rideable trail from Homestead to Key West, but as RTC points out.
Bear in mind that this multimillion-dollar project is a complex, long-term undertaking and remains far from complete. Trail sections often begin or end at roadways or bridges with inadequate shoulders, causing potentially dangerous traffic encounters.
I watched the sun set over the Gulf from the 2.2 mile-long Long Key Bridge (pictured, I have my camera, but forgot the cord to download photos). There was no green flash. Maybe tomorrow.