Crossing Lake Titikaka, Niels and I underwent our first not 100% legal “border crossing”. Lake Titikaka is the world´s largest high-altitude lake at 3.800m. It is set between Peru and Bolivia. Therefore, the police controls the persons going from one side to the other regardless the fact that you stay in Bolivia (at first). Having no passports with us, the guide found an easy solution to the problem: just stay on the bus as the police normally doesn’t inspect it (normally – that’s what he said, believe me we nearly wetted our pants). Luckily it worked out fine – otherwise you would have to send some care packages to the Bolivian prison. Copacabana is the main city on the Bolivian side of the lake. After walking around and having lunch we took a boat to Isla del Sol. The island has some Inca ruins, great views of the surrounding and – of course – a lot of sun. Unfortunately, we just got a decent overview of the island and its definitely a place worth spending 1 to 2 full days.