The Blue Nile powers this waterfall on Lake Tana in northern Ethiopia. Since most of the water is diverted to the Beles Hydroelectric Power Plant on weekdays, Sunday (when the Blue Nile Falls ...

Note: Waterfalls and trails may be subject ... you'll be rewarded with the chance to swim in a bright blue-green pool of refreshing water at the base of mesmerizing Havasu Falls.

All the rocks under your feet in the park came from ancient volcanoes. The trails cross black basalt rocks formed by lava ...