Idaho park boasts water as blue as the Caribbean Sea Box Canyon Springs Preserve offers trails to take in area’s beauty By Nicole Blanchard, Idaho Statesman Published: May 15, 2021, 6:04am Share: 3 Photos The descent into Box Canyon Springs is rocky and steep, with a cable handrail for some support. Cf'uThe terrain getting down into canyon may not be for everyone,Cf`u said Thousand Springs State Park ranger Juelie Traska. (Nicole Blanchard/The Idaho Statesman/TNS) (nicole blanchard/The Idaho Statesman) Photo Gallery BOISE, Idaho — Idaho is known for all kinds of natural wonders — mountains, canyons, waterfalls, unique rock formations. But tropical waters? One increasingly popular Southern Idaho trail follows a basalt canyon rim before taking hikers down into the canyon itself to walk along bright blue-green water reminiscent of the Caribbean Sea.