U.S. News Insider Tip: If you're lucky enough to visit Wailua Falls when locals are selling homemade banana bread out of the back of their trucks, be sure to have cash on hand to buy a loaf – it ...

Hawaii features some of the world's most beautiful beaches ... the stunning ʻŌpaeka'a Falls, a double-cascade waterfall flowing down ancient volcanic rock. But Wailua River State Park is ...