The Yuan Shan Hiking Trail in Yuanshan, New Taipei City, Taiwan is a moderately challenging 4.4-mile out-and-back trail that offers stunning views of the Dahan River. The trail is surrounded by lush forest cover and features well-maintained paths and monuments along the way. It's a popular spot for hiking and walking, and you can even bring your friends or parents along for a fun outdoor adventure. Don't forget to take some time to explore the nearby old street and check out the shops and restaurants after your hike. Overall, it's a great place to enjoy nature and soak in the beautiful scenery.