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Grand Canyon National Park
Virtual Tour
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Geologic Tours of the Grand Canyon
Travel with the USGS on a Virtual Raft Trip down the Grand Canyon starting at Lees Ferry (River Mile 0) and ending at the Lake Mead National Recreational Area.
Standard Photograph Version
3-D Anaglyphic Version (You will need red-and-cyan stereo viewing glasses to get the 3-D visual effects)
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Virtual Tour Map of Grand Canyon National Park
The Grand Canyon covers 1.2 million acres, and no two destinations are alike. We invite you to take The Grand Canyon Field Institute's virtual tour and sample the many faces of the world’s most famous chasm!
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Mapping the Grand Canyon 1923
In the summer of 1923, the USGS organized an expedition to make a new map of the Grand Canyon, which was the last stretch of the Colorado River that had not been accurately surveyed. Up until that time, only 27 men were known to have traversed the length of Marble and Grand canyons and of those, only two had any scientific knowledge (one of those two men was John Wesley Powell, the second director of the USGS, who led the first expedition down the river in 1869).
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Did You Know?
Each year, thousands of hikers enter the Grand Canyon on the Bright Angel
Trail. They follow a route established by prehistoric people for two key reasons:
water and access. Water emerges from
springs at Indian Garden, and a fault creates a break in the cliffs, providing access to the springs.
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Last Updated: July 01, 2008 at 18:44 EST |
