Problems with filling water storage tanks prompted Grand Canyon National Park on Friday to implement mandatory water conservation measures on the park's South Rim.

All paved roads into Mojave National Preserve in California remain closed because of damage caused by flash floods on July 31 and August 1, the park announced Friday. Preserve roads sustained widespread water damage, including washouts and undercutting.

Bring yourself and your smartphone to Great Sand Dunes National Park and join photographer Taz Tally for a free photo workshop to capture high-quality, memorable images with your smartphone in early October.

Have you ever wondered what constitutes a unit and what each unit represents? Do you know what constitutes the difference between a national park versus a national monument versus a national recreation area? Traveler contributing writer Rebecca Latson decided to figure that out for herself and you.