Discover Florida’s only living barrier reef at Dry Tortugas National Park, where crystal-clear waters let you snorkel among tropical fish, sea turtles, and coral reefs.

Scientists have discovered a massive deep-sea coral reef system off the coast of Argentina that may be one of the largest on ...

Known as the Sargasso Sea, sailors have crossed it for centuries, but few notice the border when they slip into glassy indigo ...

The cenotes of Mexico are famous not only for their beauty, but for the archaeological finds they reveal.

The longest Croatian mountain range isn't the tallest, but it does stretch across two counties and is home to the country's ...