After a 4 hour bus ride from Prague, Mariana and I arrived in Berlin around 6 PM . We were crashing with Mariana's friend for the night so once we arrived at the bus station, we needed to figure out how to get to his place. This quickly turned into a mess. Berlin's transit system rivals only Tokyo's in complexity. On top of that, they also run 2 different rail systems (the S-bahn above ground and U-bahn underground).