Two gigantic canyons on the moon — both deeper than the Grand Canyon — were carved in less than 10 minutes by floods of rocks ...

The city of Flagstaff has taken big steps to preserve the clarity of its night sky. Find out the best ways to experience the ...

A hunt for mountain lions along the Gila River in New Mexico led the hunter, Charles Elliott, and his guide on a chase ...

The Earth's Grand Canyon took millions of years to carve, but the moon's grand canyons took about ten minutes.

This lodge sits inside a national monument and between two national parks. Who wouldn’t want to rent one of its cabins, ...

Just in time for Valentine's Day, TPG highlights some of our favorite romantic hotels — from Hilton, Hyatt, Marriott and ...

The trail is a curated collection of national and state parks, observatories, planetariums, and musuems that offer travelers ...

Here's when and how to watch the next full moon and February's rare planetary parade, starting with the shiny bright planet of Venus.

Amid the unthinkable losses from L.A.'s unprecedented disaster, there were also small miracles and harbingers of hope across ...

From spa days in the Swiss Alps to sleep retreats overlooking the Pacific Ocean, our recommendations for self-care trips that ...