Skies were clear along most of the path of totality as the line of darkness moved 2,600 miles across the U.S. in about 90 minutes, passing through 14 states.
The next solar eclipse in the U.S. will take place in 2024. The next coast-to-coast eclipse will happen in 2045.
Traffic is backed up for miles along Interstate 5 in Oregon as people head home after viewing the eclipse.
The first total eclipse to move coast to coast over the United States in almost a century has come to an end in South Carolina.
Watch our coast-to-coast coverage of the solar eclipse. Click here and share your pics!
Here's the view from Columbia, South Carolina.
Chattanooga, Tennessee, experienced 99 percent totality.
Crowds gathered to watch the eclipse in and around Washington, D.C., where maximum coverage occurred at 2:42 p.m. local time.
President Trump and first lady Melania Trump enjoyed the view from the White House.
Bonnie Tyler's "Total Eclipse of the Heart" and Pink Floyd's "Dark Side of the Moon" experienced renewed popularity on Monday.
The eclipse reached totality in Nashville.
Excitement built as the moment approached.
Pac-Man trended on Twitter as the eclipse moved across the U.S.
Here's the moment the eclipse reached totality in Missouri.
Eclipse enthusiasts in Missouri were ready for the moment.
The path of totality has reached Nebraska.
The temperature dropped ahead of totality.
Here's the view from Idaho.
The eclipse reached totality over Oregon.
Crowds savored the moment...
... as light turned to darkness.
The eclipse is nearing totality for viewers in Oregon.
Crowds gathered in Seattle to enjoy the eclipse.
Some shared their eye protection with others.
Others found creative ways to view the spectacle.
People gathered Monday in Oregon to watch the eclipse.
Clouds obstructed the view for some.
Some Twitter users on Monday voiced wonder at the eclipse, which first became visible in West Coast states like Oregon or Washington.
Alright the eclipse has started here in Oregon! It's beautiful!!!— Rico @catfishMTV (@Rico_F_Swaqq) August 21, 2017
Roughly 2,000 people slept overnight in Salem, Oregon, on Sunday to see the eclipse the following day there, our affiliate KATU reported.
The City of Salem, Oregon, said campers were at 15 different parks in the area, with the only reported incident being a noisy family of racoons.
Our Portland, Oregon affiliate KATU reported Monday that the impending eclipse had significantly backed up traffic heading to the Santiam Rest Area in Jefferson.
Thousands reportedly waited overnight at parks and camps in Salem, Oregon, before Monday's event, while people unpacked chairs and telescopes along the side of the road in Jefferson.
The sun will reportedly be eclipsed around 9 a.m. local time Monday for viewers in Oregon and Washington, with the moon covering the totality of the sun about 70 minutes later.
Meteorologist Alex Liggitt of our affiliate WJLA gave Circa the forecast for the solar eclipse.
A total eclipse will be traveling across the United States on Monday, Aug. 21, from Oregon to South Carolina. An estimated 20 million people are making the journey to cities and towns in the line of totality, including Salem, Oregon; Casper, Wyoming; St. Joseph, Missouri; Nashville, Tennessee; and Charleston, South Carolina.
But even if you do not live in the line of totality, everyone across the U.S. mainland will be able to view this eclipse. It's the first time since the 1800s that a solar eclipse will be visible from all corners of the contiguous United States. NASA has created a tool to allow everyone to see what the eclipse will look like where they live.
Many teachers and school systems are excited to give their students a real-life science lesson during the eclipse, but some school systems are worried about the potential dangers and have opted to actually cancel classes or recess for Monday.
Some parts of the country are also bracing for possible economic impacts from the eclipse. On the East Coast, North Carolina, which is home to more solar power than any state except California, is preparing for the moment when the sun disappears during a peak time for solar energy production.
Some folks, like this Oregon couple, have been planning for the big day for years.
The eclipse doesn't have to just be for science nerds. It can be a fun time to gather with friends, enjoy a few beverages, and have a tailgate party.
The U.S. Postal Service has designed special stamps in honor of the eclipse. Those mailing letters from within the line of totality can also get a special postmarks on their "snail mail." Krispy Kreme is even getting in on the eclipse action. The doughnut company is offering special chocolate-glazed donuts for a limited time in honor of the eclipse.