Considering the Hotel California in Berlin?
A VT member wrote the following comment about visiting Berlin:
Bus number 100 by Kvamkvam
Forget about those guided tours around Berlin. They will rip you off and are not worth it!
Bus number 100 take you around to all the major attractions. Buy a daycard (tageskart), and you can jump on and off the bus whenever you want. And the daycard is also valid on the underground and all city transportation!