Ethiopia is a time capsule of a nation and a place Bob has always wanted to visit. It is a holy place to Christians, Muslims, and also Rastafarians. It's also the birthplace of coffee, and the mountainous home to the world's best long-distance runners. Mack and Bob travel to the Horn of Africa to discover the rich customs and culture in this nation once known for a crushing famine and war. The Woodruffs start their trip in Harar, a city that dates back to the tenth century, where the local custom of feeding hyenas by hand outside the city walls tests Bob's appetite for danger. Mack cultivates his photography skills, which prove far better than his bargaining skills when he takes on his dad in a goat-trading competition. Their journey takes them through some of Ethiopia's most surprising sights, including a Rastafarian enclave and a wildlife reserve where troops of baboons live amongst oasis-like hot springs. But it's deep in what some consider Africa's largest cave system that Mack discovers his greatest treasure.