Lighting strike at Grand Canyon National Park.

Aerial view of the Washington Monument in Washington, D.C.

Nighttime at Great Smoky Mountains National Park.

Lighting at Grand Canyon National Park.

Autumn at Acadia National Park.

Bison at Yellowstone National Park.

White Sands National Monument.

Vermilion Cliffs National Monument.

Grand Tetons National Park.

Fall in Rocky Mountain National Park.

Sunset at Grand Teton National Park.

Northern Lights at Denali National Park.

Rocky Mountain National Park.

Nighttime at Arches National Monument.

Sunrise at Yosemite National Park.

Twitter is showing off its power as a source of news and commentary with a showcase of 2013’s biggest events as seen on, where else, Twitter.

It’s a big week for social media sites sharing information about user behavior. Earlier, Facebook shared the most checked-in travel sights in the U.S. and abroad.

Inside Twitter’s year-end feature is a roundup of the most popular images shared by the U.S. Department of the Interior, which manages the country’s national park system. The images are above, and you can click through to the original post on Twitter for full stats on sharing.

During the U.S. government shutdown in October, users of Instagram took to their smartphones to post images of national parks that had been closed because of political battles in Washington, D.C.

Twitter’s roundup also included National Geographic’s tweets and images from the brand’s 125th anniversary year.

 

Photo Credit: The U.S. Department of the Interior took to Twitter this year to share photos of U.S. National Parks and Monuments. Twitter