See colorful marine life, thriving reefs, and crystal-clear waters at these top destinations from the Florida Keys to Australia. Off the coast of Brazil, halfway between São Paulo and Rio de Janeiro, ...

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 ...

While snorkeling, I encountered strange underwater creatures that looked more like bugs than fish. At first, it was confusing ...