Americans will be able to witness a rare astrological phenomenon On Aug. 21, 2017. The last time a 'total solar eclipse' was visible in the United States was 99 years ago.

This is a once-in-a-lifetime occurrence. With the sun and moon in perfect alignment, you’ll be able to see a gorgeous 360-degree sunset.

Next August, the lower 48 states will all be able to see at least a partial eclipse. Starting in Oregon around 10:15 am, the sun will disappear for two-and-half minutes. From there, the eclipse will be moving southeast until it reaches Charleston, S.C. less than two hours later.

Some people are already booking accommodations within the 50 to 70-mile-wide path to get the best view. “Totality” is when the sun is completely blocked out. According to The Washington Post, a lot of those popular locations are Grand Teton, the Great Smoky Mountains national parks, St. Louis, Kansas City and Charleston.

Start planning now to make sure you don’t miss this incredible opportunity!