Hvannagil, also known as The Golden Valley, is a 5.1-mile loop trail located in the Eastern Region of Iceland. This moderately challenging route takes about 2 hours and 17 minutes to complete on average. Hikers can expect to explore a colorful rhyolite canyon with spectacular rock formations, birdwatching opportunities, and serene river views. Just watch out for some tricky spots and river crossings along the way!