rugged

The Inca Road provided a network that linked up an empire across rugged terrain.

In 18 key locations across the country—from rugged mountains to rolling farmlands to the suburbs—conservation groups are experimenting to determine what works best in different environments.

Wordless interludes find Jem and Ray dancing to music or sparring as boxers, their simmering feud reduced to its core elements of rugged masculinity and sibling rivalry.

He said he had heard of a community of chimpanzees on the rugged eastern shore of Lake Tanganyika where an intrepid researcher might make valuable discoveries.

In the Sierra Nevada, the snow that blankets the rugged landscape each winter melts and gushes in meadows, streams and rivers, nourishing alpine ecosystems and filling reservoirs.