This extraordinary discovery not only redefines our understanding of salt caves but also adds a geological wonder to Israel’s ...

At high tide, it looks like the Pacific Ocean is draining into a circular hole in the middle of Cape Perpetua, just south of Yachats, Oregon. While its dramatic appearance has earned it nicknames ...

Most people think of visiting big cities, national parks, and beaches when they plan a U.S. trip. There’s hardly anyone who’s ...

(This program is no longer available for streaming.) Follow a fearless team of scientists as they venture into blue holes—underwater caves that formed during the last ice age, when sea level ...

NPCA shares the latest archaeological discovery at Mammoth Cave National Park, which has a pretty fascinating human history, too.

The Southern Ocean, which circles the globe without being blocked by land, is home to the Antarctic Circumpolar Current (ACC), the longest of the world's ocean currents. Also known as the "channel ...

The sparkling blue waters of the Mediterranean Sea are home to over 700 varieties of fish and almost 10 per cent of the world's marine species. Its coastline is one of the most densely populated ...

Once submerged under the sea millions of years ago, the Cayman Crystal Caves were shaped by water erosion, creating rooms filled with stalagmite and stalactite formations. Over time, dripping ...