Walking is quite strenuous in parts, with streams carving deep valleys into the rocks.

Streams have deeply carved valleys, while the Mississippi River has spectacular bluffs.

More than 10,000 years ago, glaciers retreated from Northeast Ohio, carving ravines and valleys.

The ice had pushed its way all over the land, the tongues of glaciers carving valleys through solid rock.

All three have carved wide fertile valleys into the Nechako Plateau.

Sinaloa is traversed by many rivers, which carve broad valleys into the foothills.

Erosion by rain and rivers has carved deep jungle canyons and valleys into the sandstone.

Glaciers move through the mountains like slow-motion rivers carving deep valleys and craggy peaks.

More recently, glaciation carved U-shaped valleys and hollowed out beds that today hold seven alpine lakes.

This also meant that streams in the region could carve broad valleys.