Travel & Cultures
Hot Hotel Offers >>
TRAVEL & CULTURES MAINCONTINENTSREGIONSCOUNTRIESCITIESPARKSPLACES OF A LIFETIMEA-Z
Photo Gallery: U.S. Landmarks and National Parks
PREVIOUS10 of 10
Photo: Tourists watch the Old Faithful geyser
Photo: The Treasury at Petra, Jordan Photo: The Treasury at Petra, Jordan Photo: The Treasury at Petra, Jordan Photo: The Treasury at Petra, Jordan Photo: The Treasury at Petra, Jordan Photo: The Treasury at Petra, Jordan Photo: The Treasury at Petra, Jordan Photo: The Treasury at Petra, Jordan Photo: The Treasury at Petra, Jordan Photo: The Treasury at Petra, Jordan
ENLARGEWallpaper

Tourists look on as Old Faithful, Yellowstone National Park's most famous geyser, sends a tower of scaling water skyward. Recent research suggests the clockwork geyser eruptions are slowing down—and may even stop—due to global warming-related dry spells.

Raymond Gehman
More Photo Galleries
Photo: Red maple tree
Photo Gallery: Autumn in the United States
A season of fleeting, vibrant colors, fall is full of beautiful views brought to life as summer changes to winter.
Photo: Night view of highway along the beach
Photo Gallery: Pacific Coast
Travel along the shores of California, Oregon, and Washington as you see the sights that make this edge of the country remarkable.
Photo: Saudi Arabian Woman
Photo Galleries From Around the Globe
Let the photographers of National Geographic introduce you to the people and cultures of the world. Download free wallpapers, screensavers, and more.


SPECIAL ADVERTISING SECTION
Photo: Prize ribbon
Photo Contest
Find out who takes home the Grand Prize!
Photo: Glass of water
Take Quiz
Test your water knowledge.
National Parks Guide
National Parks Guide