Cu Chi Tunnels is a 250-kilometer-long, intricate system of underground tunnels used by the Viet Cong during the Vietnam War. And it's a manmade wonder that's absolutely worth a visit. On a motorbike, you'll cross a scenic rural area to get to the tunnels, where you'll explore living quarters, a hospital, a command center, and more deep underground.

After you've learned the ins and outs of the tunnel, you'll be treated to a traditional Vietnamese meal of delicious local specialties such as grilled steak, fresh spring rolls, grilled ribs with lemongrass, and beef hotpot, the perfect end to a day full of fun exploring!