Dennis and Rob start the journey to their first destination -- Lake Titicaca in Peru. After a wrong-way bus trip and a ride down the world's highest zip line they experience a gnarly descent down a cliff face with only rebar ladders for support. On the Incan trail, they try new way of transportation: horses, llamas, motorbikes, and water taxis to arrive at the lake, where they race each other in the traditional reed boats of the indigenous people.