Severe storms are likely Saturday and Sunday in the Mississippi River, Ohio River and Tennessee River valleys.

CNN: Mississippi governor urges caution as river crests

But soon enough, crumbling concrete gave way to thick forest, spread across a series of river valleys.

WSJ: Armenia's Ancient Monasteries

East of the River Adur, the downs run in three long plateaux, separated by stream and river valleys.

BBC: England��s ghostly South Downs Way

The authority rates all but three of the basin's 23 river valleys as being in a poor ecological state.

ECONOMIST: Australia's water war

As he explored wild country, he heard a call to preserve our country's heritage that echoed throughout our forests and river valleys.

WHITEHOUSE: Presidential Proclamation -- National Park Week, 2012

Ramble through romantic river valleys, hike among fragrant pines, bag Alpine peaks or simply go for a walk by the lake or through the dunes.

BBC: Getting fresh in Germany: Cycling, hiking and skiing

Concentration for most pollutants remains high despite legislation passed in 2002 to control emissions in ten of China's biggest cities and several river valleys that provide industrial arteries into the interior from the heavily populated coasts.

FORBES: Pollution And Prosperity

The jeeps travel on rudimentary dirt tracks (built to access Tahiti's network of hydroelectric stations) and skirt sheer drops overlooking vast river valleys while going up hills so steep you feel like gravity is no longer on your side.

BBC: Five ways to experience Tahiti's waterfall valleys

On the border of Spain, with the great spiky Pyrenees mountain range as backdrop, the Midi-Pyrenees is an area characterized by magnificent architecture, medieval villages, river valleys, rolling farmlands, and food that is fabulous as only the French can deliver.

FORBES: Connect

The A4042 is shut in both directions between the A40 Monmouth Road junction and Heads of the Valleys A465 at Abergavenny, after a river burst its banks at Llanellen.

BBC: Flood warnings issued for Wales