Valles Marineris in imagery captured the Mars Reconnaissance Orbiter. Global topography: NASA/GSFC CTX global mosaic: ...

Grand Canyon National Park continues to draw visitors during the government shutdown. But former workers are petitioning to ...

TUCSON, Ariz. — With temperatures starting to rise, it's best to find things to do outdoors during the evening. Sabino Canyon Crawler is offering its night tour on Saturdays starting June 28 through ...

The Grand Canyon is known as a world-renowned tourist destination for its breathtaking vistas and outdoor adventures. But within the striated canyon walls, a hidden world of microscopic marvels ...

A Texas man died while hiking in the Grand Canyon, the National Park Service said Wednesday, as the agency warned of temperatures reaching over 110 degrees. Park rangers were alerted to an ...

A raging wildfire has destroyed dozens of structures in Grand Canyon National Park, including a beloved historic lodge that was already rebuilt once after burning down nearly a century ago. For ...

A fierce blaze that has burned along the Grand Canyon's North Rim since being sparked by lightning on July 4 has exploded in size in recent days, reaching "megafire" status and becoming the largest ...