You Might Catch a 'Moonbow' If You Visit the Largest Waterfall on Earth at Night

“Mosi-oa-Tunya,” or “The Smoke that Thunders,” is more commonly known as Victoria Falls, and is located between the two African nations of Zambia and Zimbabwe.

These are not the tallest or widest falls on Earth — they stretch about 354 feet across and about a mile high — but Victoria Falls is the largest waterfall by volume. More than 145 million gallons of water spill over the falls every minute.

Related: 13 Places Where You Can See the Bluest Water in the World

The falls have evolved over millennia, cutting into the natural sandstone, and their awe-inspiring beauty and power got them recognized as one of the “Seven Natural Wonders” by CNN.Light hitting the mist from the falls forms rainbows that can be seen daily, and sometimes, during a full moon, visitors can even see a “moonbow.”

Mosi-oa-Tunya is protected as a World Heritage site.

If you’re planning on taking a trip to the falls, it’s not just an impressive sight to behold. Between September and December, if you’re very brave and a good swimmer, you can take a dip in the Devil’s Pool — a swimming hole that forms at the falls’ edge only during this time.

Otherwise, just be sure to pack a camera. And a poncho.