A tall waterfall plunges into a rocky pool inside a dense tropical rainforest in Costa Rica. Steep canyon walls are covered with moss, vines, and thick vegetation. This remote rainforest setting ...

Hike through an Illinois canyon of stone bridges and cool stairways to reach a beautiful waterfall that feels like the trail’s grand finale.

A rare species prized by birders in Southern Arizona has been unceremoniously stripped of its elegance, and at least one local expert isn’t happy about the change. A leading panel of taxonomists ...

A few months from now, the monsoon-soaked sky islands of Southern Arizona will erupt into a spongy, white-capped wonderland. And the mushroom man will be there. Tucson resident Hernán Castro said he ...