As far as hidden gems go, Emerald Cave certainly qualifies. It’s a small grotto carved from the rocky walls of a canyon on the Colorado River in northwestern Arizona that can only be reached by a boat ...

WILLOW BEACH — There is a cave with sparkling green water right here in Arizona! Welcome to the Emerald Cave at Emerald Cove in Willow Beach, Arizona. This glowing green spectacle is only accessible ...

Evie Carrick is a writer and editor who’s lived in five countries and visited well over 50. She now splits her time between Colorado and Paris, ensuring she doesn't have to live without skiing or L'As ...

Lapland has the northern lights. Yosemite has a moonbow that forms over its waterfalls. Now the Colorado River near Hoover Dam claims that waters inside a small cave turn a brilliant emerald green at ...

WILLOW BEACH — There is a cave with sparkling green water right here in Arizona! Welcome to the Emerald Cave at Emerald Cove in Willow Beach, Arizona. This glowing green spectacle is only accessible ...

Emerald Cave, a small grotto on the Colorado River, is accessible by kayak, canoe or paddleboard. The cave's green shimmer is caused by sunlight reflecting off the canyon walls and underwater algae.