at Kayak Kauai at the Wailua River Marina. Then, head out for a peaceful 2.5-mile float down the river and a half-mile hike to see Secret Falls, aka Uluwehi Falls, with its 100-ft cascade.

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 ...