rugged

A gateway to Yellowstone National Park surrounded by rugged scenery, the city draws a steady stream of tourists and is stocked with restaurants, bars and galleries.

But the book comes superbly to life in its character sketches, its bawling dialogue and its rugged sense of place.

"The fact Gus is a small child, the terrain is extremely rugged, harsh and subject to changing weather conditions has made the searching difficult and more challenging for those involved," police said in a statement.

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.