"The Grand Canyon is a steep-sided gorge carved by the Colorado River in the US in the state of Arizona. It is largely contained within the Grand Canyon National Park, one of the first national parks in the United States. President Theodore Roosevelt was a major proponent of preservation of the Grand Canyon area, and visited it on numerous occasions to hunt and enjoy the scenery.
The Grand Canyon is 277 miles (446 km) long, ranges in width from 4 to 18 miles (6.4 to 29 km) and attains a depth of over a mile (1.83 km) (6000 feet). Nearly two billion years of the Earth's geological history have been exposed as the Colorado River and its tributaries cut their channels through layer after layer of rock while the Colorado Plateau was uplifted. While the specific geologic processes and timing that formed the Grand Canyon are the subject of debate by geologists, recent evidence suggests the Colorado River established its course through the canyon at least 17 million years ago. Since that time, the Colorado River continued to erode and form the canyon to the point we see it at today.
Before European immigration, the area was inhabited by Native Americans who built settlements within the canyon and its many caves. The Pueblo people considered the Grand Canyon a holy site and made pilgrimages to it.
The first European known to have viewed the Grand Canyon was García López de Cárdenas from Spain, who arrived in 1540." - in: wikipedia
"Death Valley National Park comprises more than 3.3 million acres of spectacular desert scenery, rare desert wildlife, complex geology, undisturbed wilderness and sites of historical interest. Death Valley is unique because it contains the lowest, hottest, driest location in North America. Nearly 550 square miles of its area lie below sea level. Ecologically, its plants and animals are representative of the Mojave Desert.
Death Valley is one of the hottest places on earth, attaining the second-highest temperature ever recorded, 134 degrees F. in 1913. It contains the lowest point in the western hemisphere -- 282 feet below sea level near Badwater -- as well as numerous high-rising mountain peaks, including Telescope Peak at over 11,000 feet. Death Valley was named by gold-seekers, some of whom died crossing the valley during the 1849 California gold rush." - in: http://www.desertusa.com/dv/du_dvpmain.html
"The Rhode Island State House is the capitol of the U.S. state of Rhode Island. It is located on the border of Downtown and Smith Hill in the state capital city of Providence. The State House is a neoclassical building that houses the Rhode Island General Assmbly and the offices of the governor of Rhode Island as well as the lieutenant governor, secratary of state, and general treasu. The building is on the National Register of Historic Places.