View historic maps of the Grand Canyon that tell tales of exploration of the national park.

Bradford Washburn’s map, “The Heart of the Grand Canyon,” published by National Geographic in 1978, is still considered by many to be the most beautiful map of the area ever created.

This a portion of a 1858 relief map of the Colorado River that shows a detail of the Grand Canyon. It played an important role in early maps of the Grand Canyon. The map was produced during Lieutenant ...

Are there free things to do at the Grand Canyon with children? If you're planning a family trip to the Grand Canyon—one of the seven natural wonders of the world—you’ve come to the right place.

By combining high-definition maps with sensors that detect changes in the water column, researchers have created a "centimeter-scale" picture of how currents and tides shape the Monterey Canyon.

See the 2,500 mile-long (4000 km) Valles Marineris in imagery captured the Mars Reconnaissance Orbiter. Global topography: NASA/GSFC CTX global mosaic: NASA/MSSS/Caltech/ CTX topography: NASA/MSSS ...

This Dutch geologist completed the first topographic maps of the canyon. The North Rim’s François Matthes Trail is a pleasant five-mile hike through pine forests and open meadows.

Could the origins of the Grand Canyon lie in an enormous flood? The answer is no, says geologist Bill Dickinson, an emeritus professor of geology at the University of Arizona in Tucson.

A project to map the canyon using sonar with a resolution of about one meter (3.3 feet) mounted on autonomous underwater vehicles (AUVs) began 15 years ago.

In Grand Canyon National Park, these vital signs include water quality, bird communities, springs, aquatic macroinvertebrates and upland vegetation and soils. Management of the Outstanding Universal ...

A topographic map of Greenland from bedrock elevation data. (Image credit: J. Bamber, University Bristol) The great river channel could explain the missing lakes under Greenland's interior ice sheet.

• Also included: A general topographical map of Grand Canyon National Park. A compass. A Petzl Tikka headlamp (www.petzl.com). Matches. A rescue mirror.