The House budget includes $1.2 million to use drones for creating a 3D map to identify pollution sources threatening clarity ...

a secret cave that is. Stretching approximately eight miles, these beautiful underground passageways (dubbed Rio Secreto, or ...

The Neglinnaya River (also called the Neglinka River) used to flow across Moscow from north to south, until it was buried underground in 4.7 miles (7.5 kilometers) of tunnels. Today it drains into ...

In a cave in southern Italy, archaeologists sifted through a muddy riverbed normally submerged by the turquoise waters of an underground river. A dull brown artifact caught their attention — and ...

Deep underground, a construction crew is hard at ... This $615 million project is key to cleaning up the Potomac River. When heavy rain strikes a centuries-old neighborhood in Alexandria, Va., ...

The underground river that flows into Pantai Baron in Gunungkidul, Yogyakarta, overflowed due to the flood that occurred on ...

In many parts of Brazil, rivers may be losing water to the ground instead of gaining from it. A recent study found that ...

It's the final leg of the massive Colorado River Aqueduct: the 13-mile-long San Jacinto tunnel, bringing up to 1,700 cubic feet of water per second underneath one of Southern California's tallest ...