Bus rides are usually not a travelpig's highlight but the one from Copacabana to La Paz is definitely worth reporting about.
We left Copa ... Copacabana (o.k., nuff of that ...) around noon for the three to four hours ride (15 Bolivianos).
The first part of the road meanders along Lake Titicaca. Now you will understand why everybody says that the Bolivian side of the Lake is prettier than the Peruvian part. You then soon reach the ferry (photo) where the busses are put on ponton like flotation devices (would not call it a ferry ...) to cross the lake.
Once you left the lake you get an introduction to Bolivia's sceneries with amazing views on snowcapped mountains.