Add Yahoo as a preferred source to see more of our stories on Google. 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 ...

If you’ve ever been on a cave tour where the guide shines a black light, you’ve seen the walls and formations glow. The stunning fluorescence is often the result of impurities trapped in calcite rocks ...

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 ...