Namibia is also home to the second-largest canyon in the world

The Fish River Canyon, near the border with South Africa, is the world's oldest canyon and one of the things you should know about Namibia. The canyon was formed at least 500 million years ago by water and wind erosion combined with valley floor collapse, according to researchers. It is the world's second largest canyon, after the Grand Canyon in the United States.

Visitors to the canyon can embark on an unguided 4- to 5-day hike through the canyon, sleeping under the stars. The Fish River Canyon hiking trail is 85 kilometers (52.8 miles) long, and interested hikers must book ahead of time. Hiking through the Fish River Canyon is an incredible experience, and experienced hikers will appreciate the opportunity to explore the canyon while being so close to nature. Bookings must be made well in advance because the canyon has a daily limit of 30 people. The trail is only open for hiking between May 1st and September 15th, and a group of three hikers is required.