Bridge to Nowhere is hands down my absolute favorite hike anywhere, ever, thus far in my life. It is an approximately 10 mile round trip hike up Azusa Canyon to a bridge that leads to literally nowhere. Along the route you have a couple deep water crossings which keeps the long hike up and back fun and interesting. And, despite being fairly long the terrain makes the hike more accessible then you might think to hikers of different skill levels, just be sure to give yourself enough time and pack in plenty of water and food.