857-86016 - Hikers overlook the Colorado River as they exit the Deer Creek Narrows in the Grand Canyon outside of Fredonia, Arizona November 2011. The 21.4-mile loop starts at the Bill Hall trailhead on the North Rim and descends 2000-feet in 2.5-miles through Coconino Sandstone to the level Esplanada then descends further into the lower canyon through a break in the 400-foot-tall Redwall to access Surprise Valley. Hikers connect Thunder River and Tapeats Creek to a route along the Colorado River and climb out Deer Creek.
747-1423 - Architectural detail of a culvert exit approximately 30 cm high, under the wall of the AD 130 Cilurnum - Chesters Roman Fort, Chollerford, Northumbria National Park, England, United Kingdom, Europe
911-6945 - Avalanche protection for the high voltage power cables as they exit the underground Fljotsdalur hydro power station part of Karahnjukar a massive new controversial hydro electricity project in North East Iceland, Polar Regions