In this Nevada wildlife refuge area, discover a mysterious geothermal pool that houses the world's rarest fish and extends ...

More than a billion people across the world depend on wetlands for their livelihoods – that’s about one in eight people on Earth. The theme for World Wetlands Day is “Wetlands and human ...

At Devil’s Millhopper Geological State Park in Gainesville, a 120-foot-deep sinkhole invites visitors to step into a world of ...