It doesn’t involve flippers. Or masks. And forget diving. Land snorkeling, according to its ethos, could be watching an army of ants re-engineer a driveway crack; noticing the perfect spheres of dew ...

Crystal-clear, azure waters and warm year-round temperatures make Key West one of the top destinations for snorkeling in the U.S. Just 5 miles offshore, you'll find a living coral barrier reef (the ...